[3] Name on the Register [4] Image Date listed [5] Location City or town Description 1 Arnett-Fullen House Arnett-Fullen House January 29, 2009 (# 08001376 ) 646 Pearl St. 40°00′58″N 105°17′12″W / 40.0162°N 105.2867°W / 40.0162; -105.2867 (Arnett-Fullen House ) Boulder Commonly referred to as the Gingerbread House. 2 Hannah Barker House Hannah Barker House September 12, 2019 (# 100004376 ) 800 Arapahoe Ave. 40°00′46″N 105°17′05″W / 40.0129°N 105.2847°W / 40.0129; -105.2847 (Hannah Barker House ) Boulder 3 Boulder County Poor Farm Boulder County Poor Farm September 13, 2001 (# 01000969 ) 63rd St. near its junction with Jay Rd. [6] 40°02′44″N 105°12′23″W / 40.0456°N 105.2063°W / 40.0456; -105.2063 (Boulder County Poor Farm ) Boulder 4 Boulder Creek Bridge Boulder Creek Bridge March 11, 2003 (# 03000103 ) State Highway 119 at milepost 39.13 40°00′53″N 105°19′16″W / 40.01476°N 105.32100°W / 40.01476; -105.32100 (Boulder Creek Bridge ) Boulder Concrete slab and beam bridge built in 1953, one of first in state having parabolically arched beams rather than flat ones. 5 Boulder Valley Grange No. 131 Boulder Valley Grange No. 131 December 7, 1987 (# 87002009 ) 3400 N. 95th St. 40°02′13″N 105°07′48″W / 40.0369°N 105.1300°W / 40.0369; -105.1300 (Boulder Valley Grange No. 131 ) Lafayette 6 Buchan Cabin Upload image September 3, 2020 (# 100005521 ) 2386 Cty. Rd. 111 39°58′02″N 105°36′09″W / 39.9671°N 105.6025°W / 39.9671; -105.6025 (Buchan Cabin ) Eldora vicinity 7 Bunce School Bunce School May 22, 1986 (# 86001109 ) State Highway 7 south of Allenspark 40°10′23″N 105°28′09″W / 40.17292°N 105.46905°W / 40.17292; -105.46905 (Bunce School ) Allenspark Log one-room schoolhouse built in 1888. 8 T.M. Callahan House T.M. Callahan House May 16, 1985 (# 85001064 ) 312 Terry St. 40°09′52″N 105°06′17″W / 40.16450°N 105.10481°W / 40.16450; -105.10481 (T.M. Callahan House ) Longmont 1892-built Queen Anne-style brick house 9 Cardinal Mill Cardinal Mill December 22, 2011 (# 11000945 ) Along Coon Track Creek at Cardinal [7] 39°58′08″N 105°33′00″W / 39.9689°N 105.5500°W / 39.9689; -105.5500 (Cardinal Mill ) Nederland 10 Carnegie Library Carnegie Library February 16, 1979 (# 79000573 ) 1125 Pine St. 40°01′12″N 105°16′52″W / 40.0200°N 105.2811°W / 40.0200; -105.2811 (Carnegie Library ) Boulder 11 Chautauqua Auditorium Chautauqua Auditorium January 21, 1974 (# 74000562 ) Chautauqua Park 39°59′51″N 105°16′47″W / 39.9975°N 105.2797°W / 39.9975; -105.2797 (Chautauqua Auditorium ) Boulder 12 Church of the Brethren Church of the Brethren January 5, 1984 (# 84000794 ) 17th Ave. 40°11′19″N 105°10′06″W / 40.1886°N 105.1683°W / 40.1886; -105.1683 (Church of the Brethren ) Hygiene 13 Colorado Chautauqua Colorado Chautauqua March 21, 1978 (# 78000830 ) 900 Baseline Rd., Chautauqua Park 39°59′52″N 105°16′50″W / 39.9978°N 105.2806°W / 39.9978; -105.2806 (Colorado Chautauqua ) Boulder 14 Columbia Cemetery Columbia Cemetery August 1, 1997 (# 97000792 ) Along 9th St., bounded by Pleasant and College Aves. 40°00′30″N 105°16′58″W / 40.0083°N 105.2828°W / 40.0083; -105.2828 (Columbia Cemetery ) Boulder 15 Congregational Church Congregational Church May 20, 1983 (# 83001298 ) 300 E. Simpson St. 39°59′53″N 105°05′15″W / 39.9981°N 105.0875°W / 39.9981; -105.0875 (Congregational Church ) Lafayette 16 Denver Elevator-Grain Elevator Denver Elevator-Grain Elevator February 14, 1986 (# 86000212 ) Tract 712 near State Highway 42 39°58′36″N 105°07′45″W / 39.9767°N 105.1292°W / 39.9767; -105.1292 (Denver Elevator-Grain Elevator ) Louisville Commonly referred to as Louisville Grain Elevator [8] [9] 17 Denver, Boulder and Western Railway Historic District Denver, Boulder and Western Railway Historic District September 18, 1980 (# 80000882 ) State Highway 72 40°00′27″N 105°29′58″W / 40.0075°N 105.4994°W / 40.0075; -105.4994 (Denver, Boulder and Western Railway Historic District ) Ward Also known as the Switzerland Trail . 18 Denver, Northwestern and Pacific Railway Historic District Denver, Northwestern and Pacific Railway Historic District September 30, 1980 (# 80000881 ) Southwest of Eldora 39°54′52″N 105°41′10″W / 39.9144°N 105.6861°W / 39.9144; -105.6861 (Denver, Northwestern and Pacific Railway Historic District ) Eldora Historic railroad route over Rollins Pass ; extends into Gilpin and Grand counties. 19 Dickens Opera House Dickens Opera House July 28, 1987 (# 87000702 ) 300 Main St. 40°09′52″N 105°06′06″W / 40.1644°N 105.1017°W / 40.1644; -105.1017 (Dickens Opera House ) Longmont 20 Downtown Boulder Historic District Downtown Boulder Historic District December 3, 1980 (# 80000878 ) State Highway 119 40°01′07″N 105°16′43″W / 40.0186°N 105.2786°W / 40.0186; -105.2786 (Downtown Boulder Historic District ) Boulder 21 Downtown Longmont Historic District Downtown Longmont Historic District August 28, 2017 (# 100001501 ) Roughly Main, Coffman & Kimbark Sts. between 3rd & 5th Aves. 40°09′57″N 105°06′09″W / 40.1657°N 105.1025°W / 40.1657; -105.1025 (Downtown Longmont Historic District ) Longmont 22 East Longs Peak Trail East Longs Peak Trail July 10, 2007 (# 07000740 ) West of State Highway 7 [10] 40°16′20″N 105°36′02″W / 40.2722°N 105.6006°W / 40.2722; -105.6006 (East Longs Peak Trail ) Allenspark Extends into Larimer County . 23 East Side Historic District East Side Historic District October 2, 1986 (# 86002812 ) Roughly bounded by Long's Peak Ave., Collyer St., Fourth Ave., and Emery St. 40°10′00″N 105°05′56″W / 40.166667°N 105.098889°W / 40.166667; -105.098889 (East Side Historic District ) Longmont 24 Eldora Historic District Eldora Historic District October 4, 1989 (# 89000978 ) Roughly Eaton Pl., 6th, Pearl, and 4th Sts., Huron Ave., 6th St., Eldorado Ave., and 7th St., Klondyke Ave., and 10th St. 39°57′01″N 105°34′17″W / 39.950278°N 105.571389°W / 39.950278; -105.571389 (Eldora Historic District ) Eldora 25 Empson Cannery Empson Cannery January 5, 1984 (# 84000796 ) 15 3rd Ave. 40°09′49″N 105°05′37″W / 40.163611°N 105.093611°W / 40.163611; -105.093611 (Empson Cannery ) Longmont 26 First Baptist Church of Boulder First Baptist Church of Boulder April 14, 2004 (# 04000275 ) 1237 Pine St. 40°01′13″N 105°16′45″W / 40.020278°N 105.279167°W / 40.020278; -105.279167 (First Baptist Church of Boulder ) Boulder 27 First Congregational Church of Lyons First Congregational Church of Lyons December 12, 1976 (# 76000547 ) High and 4th Sts. 40°13′33″N 105°16′11″W / 40.225833°N 105.269722°W / 40.225833; -105.269722 (First Congregational Church of Lyons ) Lyons 28 Fox Mine Office Fox Mine Office February 23, 1996 (# 96000168 ) 1226 S. Cherryvale Rd. 39°58′06″N 105°12′51″W / 39.968333°N 105.214167°W / 39.968333; -105.214167 (Fox Mine Office ) Boulder 29 Fox Stone Barn Fox Stone Barn February 16, 1996 (# 96000070 ) S. Cherryvale Rd., 0.5 miles south of U.S. Highway 36 39°58′10″N 105°12′46″W / 39.969444°N 105.212778°W / 39.969444; -105.212778 (Fox Stone Barn ) Boulder 30 Ginacci House Ginacci House February 14, 1986 (# 86000213 ) 1116 LaFarge St. 39°58′52″N 105°07′57″W / 39.981111°N 105.132500°W / 39.981111; -105.132500 (Ginacci House ) Louisville 31 Gold Hill Historic District Gold Hill Historic District August 3, 1989 (# 89000979 ) Roughly bounded by North St., Pine St., Boulder St., Gold Run St., and College St. 40°03′43″N 105°24′26″W / 40.061944°N 105.407222°W / 40.061944; -105.407222 (Gold Hill Historic District ) Gold Hill 32 Gold Miner Hotel Gold Miner Hotel July 3, 1997 (# 97000657 ) 601 Klondyke Ave. 39°57′01″N 105°34′10″W / 39.950278°N 105.569444°W / 39.950278; -105.569444 (Gold Miner Hotel ) Eldora 33 Highland School Highland School December 18, 1978 (# 78000831 ) 885 Arapahoe Ave. 40°00′48″N 105°17′01″W / 40.013333°N 105.283611°W / 40.013333; -105.283611 (Highland School ) Boulder 34 David Hull Holmes House David Hull Holmes House December 3, 2018 (# 100003225 ) 720 11th St. 40°00′01″N 105°16′43″W / 40.0004°N 105.2786°W / 40.0004; -105.2786 (David Hull Holmes House ) Boulder 35 Hotel Boulderado Hotel Boulderado November 3, 1994 (# 94001226 ) 2115 13th St. 40°01′09″N 105°16′43″W / 40.019167°N 105.278611°W / 40.019167; -105.278611 (Hotel Boulderado ) Boulder 36 Hoverhome and Hover Farmstead Hoverhome and Hover Farmstead January 15, 1999 (# 98001555 ) 1303-1309 Hover Rd. 40°10′55″N 105°07′53″W / 40.181944°N 105.131389°W / 40.181944; -105.131389 (Hoverhome and Hover Farmstead ) Longmont 37 Jacoe Store Jacoe Store February 14, 1986 (# 86000215 ) 1001 Main St. 39°58′47″N 105°07′53″W / 39.979722°N 105.131389°W / 39.979722; -105.131389 (Jacoe Store ) Louisville 38 Jamestown Mercantile Building Jamestown Mercantile Building August 3, 1989 (# 89000985 ) Main St. 40°06′57″N 105°23′18″W / 40.115833°N 105.388333°W / 40.115833; -105.388333 (Jamestown Mercantile Building ) Jamestown 39 Jamestown Town Hall Jamestown Town Hall July 10, 2003 (# 03000615 ) 118 Main St. 40°06′58″N 105°23′15″W / 40.116111°N 105.387500°W / 40.116111; -105.387500 (Jamestown Town Hall ) Jamestown 40 Kullgren House Kullgren House May 20, 1983 (# 83001299 ) 209 E. Cleveland St. 39°59′51″N 105°05′17″W / 39.997500°N 105.088056°W / 39.997500; -105.088056 (Kullgren House ) Lafayette 41 Lackner's Tavern Lackner's Tavern February 14, 1986 (# 86000220 ) 1006 Pine 39°58′31″N 105°07′45″W / 39.975278°N 105.129167°W / 39.975278; -105.129167 (Lackner's Tavern ) Louisville 42 Lafayette House Lafayette House May 20, 1983 (# 83001300 ) 600 E. Simpson St. 39°59′53″N 105°05′01″W / 39.998056°N 105.083611°W / 39.998056; -105.083611 (Lafayette House ) Lafayette 43 LaSalla House LaSalla House February 14, 1986 (# 86000217 ) 1124 Main St. 39°58′53″N 105°07′52″W / 39.981389°N 105.131111°W / 39.981389; -105.131111 (LaSalla House ) Louisville 44 Lewis House Lewis House May 20, 1983 (# 83001301 ) 108 E. Simpson St. 39°59′53″N 105°05′21″W / 39.998056°N 105.089167°W / 39.998056; -105.089167 (Lewis House ) Lafayette 45 Little Church in the Pines Little Church in the Pines August 3, 1989 (# 89000983 ) 414 Gold Run Rd. 40°03′12″N 105°22′33″W / 40.053333°N 105.375833°W / 40.053333; -105.375833 (Little Church in the Pines ) Salina 46 Longhurst Lodge Upload image September 18, 2017 (# 100001606 ) State Highway 7 and County Road 82, Arapaho -Roosevelt National Forest and Pawnee National Grassland 40°15′33″N 105°32′13″W / 40.259037°N 105.536854°W / 40.259037; -105.536854 (Longhurst Lodge ) Allenspark 47 Longmont Carnegie Library Longmont Carnegie Library November 3, 1992 (# 92001406 ) 457 4th Ave. 40°09′56″N 105°06′01″W / 40.165556°N 105.100278°W / 40.165556; -105.100278 (Longmont Carnegie Library ) Longmont 48 Longmont College Longmont College August 12, 1987 (# 87001285 ) 546 Atwood St. 40°10′08″N 105°05′45″W / 40.168889°N 105.095833°W / 40.168889; -105.095833 (Longmont College ) Longmont 49 Longmont Fire Department Longmont Fire Department May 16, 1985 (# 85001063 ) 667 4th Ave. 40°09′56″N 105°06′10″W / 40.165556°N 105.102778°W / 40.165556; -105.102778 (Longmont Fire Department ) Longmont 50 Longmont Power Plant Upload image September 10, 1987 (# 87001553 ) Old Apple Valley Rd. 40°14′01″N 105°17′38″W / 40.233611°N 105.293889°W / 40.233611; -105.293889 (Longmont Power Plant ) Lyons 51 Lyons Railroad Depot Lyons Railroad Depot December 2, 1974 (# 74000563 ) 400 block of Broadway 40°13′27″N 105°16′14″W / 40.224167°N 105.270556°W / 40.224167; -105.270556 (Lyons Railroad Depot ) Lyons 52 Lyons Sandstone Buildings Lyons Sandstone Buildings April 29, 1980 (# 80000880 ) U.S. Highway 36 and State Highway 7 40°13′05″N 105°15′16″W / 40.218056°N 105.254444°W / 40.218056; -105.254444 (Lyons Sandstone Buildings ) Lyons 53 McKenzie Well McKenzie Well January 26, 2005 (# 04001553 ) Near Independence Rd. and State Highway 119 40°02′36″N 105°14′27″W / 40.043333°N 105.240833°W / 40.043333; -105.240833 (McKenzie Well ) Boulder 54 Miller House Miller House May 20, 1983 (# 83001291 ) 409 E. Cleveland St. 39°59′51″N 105°05′08″W / 39.997500°N 105.085556°W / 39.997500; -105.085556 (Miller House ) Lafayette 55 Modoc Mill Upload image December 27, 1978 (# 78000833 ) North of Ward 40°04′50″N 105°30′39″W / 40.080556°N 105.510833°W / 40.080556; -105.510833 (Modoc Mill ) Ward 56 Mount St. Gertrude Academy Mount St. Gertrude Academy November 3, 1994 (# 94001227 ) 970 Aurora St. 40°00′13″N 105°16′51″W / 40.003611°N 105.280833°W / 40.003611; -105.280833 (Mount St. Gertrude Academy ) Boulder 57 National Fuel Company Store National Fuel Company Store February 14, 1986 (# 86000222 ) 801 Main St. 39°58′09″N 105°07′53″W / 39.969167°N 105.131389°W / 39.969167; -105.131389 (National Fuel Company Store ) Louisville 58 Norlin Quadrangle Historic District Norlin Quadrangle Historic District March 27, 1980 (# 80000879 ) University of Colorado campus 40°00′32″N 105°16′20″W / 40.008889°N 105.272222°W / 40.008889; -105.272222 (Norlin Quadrangle Historic District ) Boulder 59 North St. Vrain Creek Bridge North St. Vrain Creek Bridge October 15, 2002 (# 02001159 ) State Highway 7 at milepost 32.98, over the North St. Vrain Creek 40°13′22″N 105°16′18″W / 40.22273°N 105.27167°W / 40.22273; -105.27167 (North St. Vrain Creek Bridge ) Lyons Single-span bridge built in 1955 60 Northern Colorado Power Company Substation Northern Colorado Power Company Substation May 22, 1986 (# 86001108 ) 1590 Broadway 40°00′40″N 105°16′36″W / 40.011111°N 105.276667°W / 40.011111; -105.276667 (Northern Colorado Power Company Substation ) Boulder 61 Petrelli-DelPizzo House Petrelli-DelPizzo House February 14, 1986 (# 86000224 ) 1016 Main St. 39°58′48″N 105°07′52″W / 39.980000°N 105.131111°W / 39.980000; -105.131111 (Petrelli-DelPizzo House ) Louisville 62 Rhoades House Rhoades House February 14, 1986 (# 86000226 ) 1024 Grant 39°58′49″N 105°08′06″W / 39.980278°N 105.135000°W / 39.980278; -105.135000 (Rhoades House ) Louisville 63 Robinson House Robinson House February 14, 1986 (# 86000228 ) 301 Spruce 39°58′41″N 105°08′20″W / 39.97798°N 105.13893°W / 39.97798; -105.13893 (Robinson House ) Louisville House built in 1904 64 Rock Creek Farm Rural Historic District Rock Creek Farm Rural Historic District April 20, 2023 (# 100007966 ) 2005 South 112th St. 39°57′01″N 105°05′35″W / 39.9504°N 105.0930°W / 39.9504; -105.0930 (Rock Creek Farm Rural Historic District ) Broomfield vicinity 65 Rocky Mountain Mammoth Mine Rocky Mountain Mammoth Mine July 6, 2010 (# 10000422 ) 4879 Magnolia Dr. 39°59′08″N 105°24′01″W / 39.985556°N 105.400278°W / 39.985556; -105.400278 (Rocky Mountain Mammoth Mine ) Nederland 66 St. Stephen's Episcopal Church, 1881 St. Stephen's Episcopal Church, 1881 February 24, 1975 (# 75000501 ) 470 Main St. 40°10′03″N 105°06′06″W / 40.167500°N 105.101667°W / 40.167500; -105.101667 (St. Stephen's Episcopal Church, 1881 ) Longmont 67 Salina School Salina School August 3, 1989 (# 89000984 ) 536 Gold Run Rd. 40°03′15″N 105°22′37″W / 40.054167°N 105.376944°W / 40.054167; -105.376944 (Salina School ) Salina 68 Sandbeach Lake Trail Upload image January 29, 2008 (# 07001471 ) South of Lookout Mountain 40°13′14″N 105°32′12″W / 40.220556°N 105.536667°W / 40.220556; -105.536667 (Sandbeach Lake Trail ) Meeker Park 69 Shannon Farm Shannon Farm October 17, 2003 (# 03001047 ) 1341 N. 95th St. 40°00′39″N 105°07′51″W / 40.010833°N 105.130833°W / 40.010833; -105.130833 (Shannon Farm ) Lafayette 70 Squires-Tourtellot House Squires-Tourtellot House August 10, 1978 (# 78000832 ) 1019 Spruce St. 40°01′07″N 105°16′55″W / 40.018611°N 105.281944°W / 40.018611; -105.281944 (Squires-Tourtellot House ) Boulder 71 Stolmes House Stolmes House February 14, 1986 (# 86000229 ) 616 Front St. 39°58′35″N 105°07′47″W / 39.976389°N 105.129722°W / 39.976389; -105.129722 (Stolmes House ) Louisville 72 Sunshine School Sunshine School July 27, 1989 (# 89000982 ) 355 County Road 83 40°03′42″N 105°21′54″W / 40.061529°N 105.364986°W / 40.061529; -105.364986 (Sunshine School ) Sunshine 73 Swedish Evangelical Lutheran Church of Ryssby Swedish Evangelical Lutheran Church of Ryssby February 16, 1984 (# 84000797 ) N. 63rd St. 40°08′23″N 105°12′20″W / 40.139700°N 105.205600°W / 40.139700; -105.205600 (Swedish Evangelical Lutheran Church of Ryssby ) Boulder 74 Tego Brothers Drugstore-State National Bank of Louisville Tego Brothers Drugstore-State National Bank of Louisville February 14, 1986 (# 86000230 ) 700 Main St. 39°58′37″N 105°07′51″W / 39.976944°N 105.130833°W / 39.976944; -105.130833 (Tego Brothers Drugstore-State National Bank of Louisville ) Louisville 75 The Terrace The Terrace November 3, 1987 (# 87001287 ) 207 E. Cleveland St. 39°59′54″N 105°05′17″W / 39.998333°N 105.088056°W / 39.998333; -105.088056 (The Terrace ) Lafayette 76 Thomas House Thomas House February 14, 1986 (# 86000231 ) 700 Lincoln 39°58′40″N 105°08′09″W / 39.977778°N 105.135833°W / 39.977778; -105.135833 (Thomas House ) Louisville 77 Thunder Lake Patrol Cabin Thunder Lake Patrol Cabin January 29, 1988 (# 87001124 ) Thunder Lake 40°13′20″N 105°38′39″W / 40.222222°N 105.644167°W / 40.222222; -105.644167 (Thunder Lake Patrol Cabin ) Estes Park In Rocky Mountain National Park 78 Thunder Lake Trail-Bluebird Lake Trail Upload image January 29, 2008 (# 07001472 ) Roughly along the North St. Vrain Creek , west of Wild Basin Ranger Station 40°11′34″N 105°39′07″W / 40.192778°N 105.651944°W / 40.192778; -105.651944 (Thunder Lake Trail-Bluebird Lake Trail ) Allenspark 79 US Post Office-Boulder Main US Post Office-Boulder Main January 22, 1986 (# 86000164 ) 1905 15th St. 40°01′42″N 105°16′31″W / 40.028333°N 105.275278°W / 40.028333; -105.275278 (US Post Office-Boulder Main ) Boulder 80 Walker Ranch Historic District Walker Ranch Historic District June 14, 1984 (# 84000798 ) West of Boulder; also 7.5 miles west of Boulder off Flagstaff Rd. 39°57′14″N 105°20′03″W / 39.953889°N 105.334167°W / 39.953889; -105.334167 (Walker Ranch Historic District ) Boulder Second location represents a boundary increase 81 Wall Street Assay Office Wall Street Assay Office August 3, 1989 (# 89000986 ) 6352 Four Mile Canyon Dr. 40°02′24″N 105°23′21″W / 40.040000°N 105.389167°W / 40.040000; -105.389167 (Wall Street Assay Office ) Wallstreet Assay Office for the Storm King Mine located in Wall Street, CO 82 Ward Congregational Church Ward Congregational Church August 3, 1989 (# 89000981 ) 41 Modoc 40°04′22″N 105°30′29″W / 40.072778°N 105.508056°W / 40.072778; -105.508056 (Ward Congregational Church ) Ward 83 Ward School Ward School August 3, 1989 (# 89000980 ) 66 Columbia 40°04′18″N 105°30′30″W / 40.07171°N 105.50832°W / 40.07171; -105.50832 (Ward School ) Ward School built in 1898, now a post office 84 Martha Weiser House Martha Weiser House October 16, 2013 (# 13000825 ) 4020 N. 75th St. 40°03′11″N 105°10′42″W / 40.052946°N 105.178256°W / 40.052946; -105.178256 (Martha Weiser House ) Boulder 85 West Side Historic District West Side Historic District January 7, 1987 (# 86002846 ) Roughly bounded by 5th, Terry, 3rd, and Grant 40°09′57″N 105°06′32″W / 40.165833°N 105.108889°W / 40.165833; -105.108889 (West Side Historic District ) Longmont 86 Wild Basin House Wild Basin House January 29, 1988 (# 87001125 ) Wild Basin 40°12′29″N 105°33′56″W / 40.208056°N 105.565556°W / 40.208056; -105.565556 (Wild Basin House ) Estes Park 87 Wild Basin Ranger Station and House Wild Basin Ranger Station and House January 29, 1988 (# 87001126 ) Wild Basin 40°12′32″N 105°33′55″W / 40.208889°N 105.565278°W / 40.208889; -105.565278 (Wild Basin Ranger Station and House ) Estes Park 88 Woodward-Baird House Woodward-Baird House February 15, 1979 (# 79000574 ) 1733 Canyon Boulevard 40°01′03″N 105°16′16″W / 40.017500°N 105.271111°W / 40.017500; -105.271111 (Woodward-Baird House ) Boulder