State Road 121 (SR 121) is a major state highway that runs north and south in northern Florida. The road is part of a long multi-state route that also goes through Georgia and South Carolina.
SR 121 is one of the major routes of a three-state highway 121 that totals approximately 475 miles (764km) from Lebanon Station, Florida, to Rock Hill, South Carolina.
Beginning in Lebanon Station at a channelized intersection with US19/US98 and County Road336 (CR336) in Levy County, SR121 travels through Goethe State Forest where it turns east and intersects CR337. The road makes a sharp left curve to the northeast where it travels through desolate farmland; the only resemblance to a major intersection is CR326. Within the city of Williston, SR121 has a concurrency with CR316, until the intersection with US41. It then joins US41 as CR316 continues eastward, which then joins the east end of US27 Alternate (US27 Alt.), and then the US27/US41 concurrency before breaking away to the northeast again, taking the DeSoto Trail away from US41.
North of CR335, SR121 hugs the west side of the Levy–Marion county line, but never crosses it, choosing to enter Alachua County instead. Immediately after the interchange with Interstate75 (I-75) at exit 382, SR121 makes a sharp left onto Northwest 34th Street as SR331 becomes the designation for Williston Road. As it crosses SR24 it borders the western edge of the University of Florida, passing along the 34th Street Wall just before crossing SR26A and then SR26. North of US441, the DeSoto Trail breaks away.
Briefly traveling parallel to SR100 in Lake Butler, it intersects SR100 as it continues northeast. The road also runs parallel to another rail-trail along the former Jacksonville and Southwestern right-of-way in Raiford, then serves as the western terminus of SR16 before leaving that community. After passing by the Northeast Florida State Hospital, the road intersects I-10 (Exit 335) and US90 in Macclenny close to SR228 before crossing the Georgia state line on its way to South Carolina.
History
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The segment between US 19 and 98 in Lebanon Station and US 41 in Williston was previously designated as Florida State Road 335, and the segment between US 27 and 41 in Williston, at what is today the south end of SR 331 was part of a southern extension of that route.[2] State Road 23 was defined in the 1945 renumbering as:
From a point on SR20 and SR25 approximately 1 mile (1.6km) northwest of Paradise in a northwesterly direction to the intersection with SR235 in LaCrosse and along SR235 for approximately 0.07 miles (0.11km), then continuing northwesterly via Santa Fe to a junction with SR18 at Worthington Springs and along SR18 to a point approximately 1 mile (1.6km) north of Worthington Springs, then northeasterly to a junction with SR100 in Lake Butler and East on SR100 to a point near the eastern city limits of Lake Butler then northeasterly via Raiford to a junction with SR10 in Macclenny and along SR10 to 5th Street then in a northerly direction along 5th Street to the St. Mary's River at the Georgia state line.
At some point, SR23 was renumbered as part of SR121, probably to match Georgia State Route 121. Before that, however, SR23 had been extended around the west side of Gainesville to end at US441/SR25 at Rocky Point, and the southernmost part did not become part of SR121. It was later given to the county, and has a possibility of becoming County Road 23.[clarification needed]
In 1975, the City of Gainesville recommended a truck ban along SR 121 and established a truck route around downtown. In 1979. FDOT widened the road within the city, which included the creation of a retaining wall along the University of Florida Golf Course that has since become a target for graffiti artists. The truck ban was lifted in the early 1980s, but reestablished later in the decade after a series of fatal accidents.
Florida State Truck Route 121 in Gainesville, Florida was formed in the mid-1970s in order to divert trucks form the congested downtown areas of Gainesville.[3] The route begins at the intersection of State Road 121, Florida State Road 331 and Alachua County Road 23, removing the concurrencies with the SR 24 and 26 Truck Routes. At the intersection with U.S. Route 441, the routes are joined by a truck route of that route as well. The four truck routes run northeast along SR 331 and then curve to the north. SR 331 terminates at the east end of the overlap of SRs 20, 24, and 26, which also serves as the terminus of Florida Truck Routes 24 and 26. However US 441 Truck and Florida Truck Route 121 continue to the northeast until the intersection with Florida State Road 222. At this point, the truck routes turn west overlapping SR 222 and intersection Florida State Road 20. US Truck Route 441 terminates at the intersection of SR 222 and US 441, while Florida Truck Route 121 makes a right turn and follows US 441 northbound until the intersection with its parent route.
County Road 121A is the sole suffixed alternate of SR 121 that exists within the State of Florida. It is a former segment of SR 121 that exists entirely in LaCrosse. The route is unmarked, and runs along the east side of SR 121 south of downtown to halfway between the SR 121/235 overlap across from the LaCrosse Post Office.
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US 19 / US 98 at Lebanon Station 
US 27 / US 41 in Williston 
I-75 in Gainesville 
SR 16 in Raiford 
I-10 in Macclenny 
SR 23 / SR 121 near Stokesville, GA 
