Happy Isles

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Happy Isles
Happy Isles.jpg
The Merced River in Happy Isles
Happy-Isles-topo-map.jpg
Topographic map of Happy Isles area
Geography
Coordinates 37°43′54″N119°33′31″W / 37.73171°N 119.558694°W / 37.73171; -119.558694

Happy Isles is a group of small isles in the Merced River in Yosemite National Park, California, USA. They are located at the easternmost end of the Yosemite Valley floor. This scenic spot is the starting point for the Mist Trail, and is also the northern trailhead for the John Muir Trail. [1] Happy Isles is also the trailhead for popular hiking destinations along the Mist Trail (including Vernal Falls and Nevada Falls) and Half Dome.

Happy Isles is located where the slope of the Merced River changes from the much steeper upper main stem to the essentially flat Valley floor. At Happy Isles, the river gradient is approximately 2%. The gradient of the Merced River at Happy Isles is steeper than in the Valley floor, and the channel of the river is cut into erosion-resistant granitic boulders and talus materials, compared to channel deposits of sands and gravel present on the Valley floor. The steeper gradient and composition of streambed materials together impede meandering patterns from developing in this area. [2]

The area near Happy Isles sustained damage in 1996 during a rockslide. A number of signposts near the Isles are dedicated to the rockfall.

Related Research Articles

<span class="mw-page-title-main">Yosemite National Park</span> National park in California, United States

Yosemite National Park is an American national park in the state of California, surrounded on the southeast by Sierra National Forest and on the northwest by Stanislaus National Forest. The park is managed by the National Park Service and covers an area of 759,620 acres in four counties – centered in Tuolumne and Mariposa, extending north and east to Mono and south to Madera County. Designated a World Heritage Site in 1984, Yosemite is internationally recognized for its cliffs, waterfalls, clear streams, giant sequoia groves, lakes, mountains, meadows, glaciers, and biological diversity. Almost 95 percent of the park is designated wilderness. Yosemite is one of the largest and least fragmented habitat blocks in the Sierra Nevada, and the park supports a diversity of plants and animals.

<span class="mw-page-title-main">Yosemite Valley</span> Glacial valley in California, United States

Yosemite Valley is a glacial valley in Yosemite National Park in the western Sierra Nevada mountains of Central California. The valley is about 7.5 mi (12.1 km) long and 3,000–3,500 ft (910–1,070 m) deep, surrounded by high granite summits such as Half Dome and El Capitan, and densely forested with pines. The valley is drained by the Merced River, and a multitude of streams and waterfalls flow into it, including Tenaya, Illilouette, Yosemite and Bridalveil Creeks. Yosemite Falls is the highest waterfall in North America and is a big attraction especially in the spring, when the water flow is at its peak. The valley is renowned for its natural environment and is regarded as the centerpiece of Yosemite National Park.

<span class="mw-page-title-main">Yosemite Falls</span> Waterfall in California, United States

Yosemite Falls is the highest waterfall in Yosemite National Park, dropping a total of 2,425 feet (739 m) from the top of the upper fall to the base of the lower fall. Located in the Sierra Nevada of California, it is a major attraction in the park, especially in late spring when the water flow is at its peak.

<span class="mw-page-title-main">John Muir Trail</span> Trail in the Sierra Nevada mountains of California

The John Muir Trail (JMT) is a long-distance trail in the Sierra Nevada mountain range of California, passing through Yosemite, Kings Canyon and Sequoia National Parks. From the northern terminus at Happy Isles in Yosemite Valley and the southern terminus located on the summit of Mount Whitney, the trail's length is 213.7 miles (343.9 km), with a total elevation gain of approximately 47,000 feet (14,000 m). For almost all of its length, the trail is in the High Sierra backcountry and wilderness areas. For about 160 miles (260 km), the trail follows the same footpath as the longer Pacific Crest Trail. It is named after John Muir, a naturalist.

<span class="mw-page-title-main">Mist Trail</span> Hiking trail in Yosemite National Park, California

The Mist Trail is one of the most popular short hikes in Yosemite National Park, California, USA. The steep hike follows the Merced River, starting at Happy Isles in Yosemite Valley, past Vernal Fall and Emerald Pool, to Nevada Fall.

<span class="mw-page-title-main">Merced River</span> River in California

The Merced River, in the central part of the U.S. state of California, is a 145-mile (233 km)-long tributary of the San Joaquin River flowing from the Sierra Nevada into the San Joaquin Valley. It is most well known for its swift and steep course through the southern part of Yosemite National Park, where it is the primary watercourse flowing through Yosemite Valley. The river's character changes dramatically once it reaches the plains of the agricultural San Joaquin Valley, where it becomes a slow-moving meandering stream.

<span class="mw-page-title-main">Nevada Fall</span> Waterfall in CA, US

Nevada Fall is a 594-foot (181 m) high waterfall on the Merced River in Yosemite National Park, California. It is located below the granite dome, Liberty Cap, at the west end of Little Yosemite Valley. The waterfall is widely recognized by its "bent" shape, in which the water free-falls for roughly the first third of its length to a steep slick-rock slope. This mid-fall impact of the water on the cliff face creates a turbulent, whitewater appearance in the fall and produces a great deal of mist which covers a wide radius, which led to its current name.

<span class="mw-page-title-main">History of the Yosemite area</span> History of the Sierra Nevada region of California

Human habitation in the Sierra Nevada region of California reaches back 8,000 to 10,000 years ago. Historically attested Native American populations, such as the Sierra Miwok, Mono and Paiute, belong to the Uto-Aztecan and Utian phyla. In the mid-19th century, a band of Native Americans called the Ahwahnechee lived in Yosemite Valley. The California Gold Rush greatly increased the number of non-indigenous people in the region. Tensions between Native Americans and white settlers escalated into the Mariposa War. As part of this conflict, settler James Savage led the Mariposa Battalion into Yosemite Valley in 1851, in pursuit of Ahwaneechees led by Chief Tenaya. The California state military forces burned the tribe's villages, destroyed their food stores, killed the chief's sons, and forced the tribe out of Yosemite. Accounts from the Mariposa Battalion, especially from Dr. Lafayette Bunnell, popularized Yosemite Valley as a scenic wonder.

<span class="mw-page-title-main">Vernal Fall</span> Waterfall on the Merced River in Yosemite National Park

Vernal Fall is a 317-foot (96.6 m) waterfall on the Merced River just downstream of Nevada Fall in Yosemite National Park, California. Like its upstream neighbor, Vernal Fall is clearly visible at a distance, from Glacier Point, as well as close up, along the Mist Trail. The waterfall flows all year long, although by the end of summer it is substantially reduced in volume and can split into multiple strands, rather than a single curtain of water.

<span class="mw-page-title-main">Liberty Cap (California)</span> Granite dome in Yosemite National Park, California

Liberty Cap is a granite dome in Yosemite National Park, California, United States which lies at the extreme northwestern margin of Little Yosemite Valley. It lies adjacent, to the north of Nevada Fall, on the John Muir Trail. It rises 1,700 feet (520 m) feet from the base of Nevada Fall to a peak elevation of 7,080 ft (2,158 m). A smaller, mesa-like dome called Mount Broderick stands immediately adjacent to Liberty Cap.

<span class="mw-page-title-main">Illilouette Fall</span> Waterfall in California, US

Illilouette Fall is a 381-foot (116 m) waterfall on the Illilouette Creek tributary of the Merced River in Yosemite National Park. It is located in a small canyon that cuts into the south wall of Yosemite Valley directly across from Vernal Fall. The origin and meaning of the waterfall's name has been lost to time.

<span class="mw-page-title-main">Taft Point</span>

Taft Point is a viewpoint in Yosemite National Park west of Glacier Point. It offers wide views of Yosemite Valley, Yosemite Falls and El Capitan. The main attraction of Taft Point is the giant fissures in the mile-high granite rock. The fissures are breaks and cracks in the mountain that drop directly down to the valley floor at some points.

<span class="mw-page-title-main">Yosemite West, California</span> Unincorporated community in California, United States

Yosemite West is an unincorporated community of resort homes located just outside the southern area of Yosemite National Park, just off Wawona Road, a continuation of State Route 41 from Fresno. It is a census-designated place (CDP), with a population of 47 as of the 2020 census. It is situated one mile (1.6 km) south of the Chinquapin intersection of Wawona Road with Glacier Point Road, at an altitude of 5,100 to 6,300 feet. The elevation reported by the USGS is 5,866 feet (1,788 m). The community is part of Henness Ridge, nearly 3,000 feet (910 m) above the southern banks of the Merced River and State Route 140 from Mariposa. Addresses in this area are shown as "Yosemite National Park, CA 95389".

<span class="mw-page-title-main">Little Yosemite Valley</span> Valley in Mariposa County, California

Little Yosemite Valley is a smaller glacial valley upstream in the Merced River drainage from the Yosemite Valley in Yosemite National Park. The Merced River meanders through the 3.5 mi (5.6 km) long flat valley, draining out over Nevada Fall and Vernal Fall before emptying into the main Yosemite Valley. It can be reached by a day hike from the main valley, and is the most popular area in the Yosemite Wilderness. The Valley provides access to nearby destinations such as the back side of Half Dome, Clouds Rest and the High Sierra Camp at Merced Lake.

<span class="mw-page-title-main">1996 Yosemite Valley landslide</span> Natural landslide

The 1996 Yosemite Valley landslide occurred on July 10, 1996, near the Happy Isles trailhead in Yosemite Valley, Yosemite National Park, Mariposa County, California. 162,000 tons of rocks and other debris fell to the ground at over 160 miles per hour. Of the 12 campers/hikers involved in the incident, one was killed. The landslide competes with the 1997 Merced River flood and the 2013 Rim wildfire for the designation of the worst natural disaster in Yosemite to date. The earthquake caused by the rock slide was followed almost immediately by a sonic boom. Soon afterward a granite dust mushroom cloud formed over Happy Isles. The immense pressure created at the base of the rock slide blew down giant pine trees as if they were nothing. Afterwards the nearby campground tables and trees were covered with a thick coat of granite dust.

<span class="mw-page-title-main">South Fork Kings River</span> River in California, United States

The South Fork Kings River is a 44.1-mile (71.0 km) tributary of the Kings River in the Sierra Nevada of Fresno County, California. The river forms part of Kings Canyon, the namesake of Kings Canyon National Park and one of the deepest canyons in North America with a maximum relief of 8,200 feet (2,500 m) from rim to river.

<span class="mw-page-title-main">Merced Peak</span>

Merced Peak, with an elevation of 11,731 feet (3,576 m), is the highest point in the Clark Range, just surpassing three other peaks; Red Peak, Gray Peak, and Mount Clark.

<span class="mw-page-title-main">High Sierra Camps</span>

The High Sierra Camps are nine rustic lodging facilities located in two national parks and a national monument in California's Sierra Nevada mountain range. Open most years from June or July to September, they are staffed camps with tent cabins and food service facilities. The backcountry camps receive their supplies by pack mules.

<span class="mw-page-title-main">Panorama Trail</span>

The Panorama Trail is a marked hiking trail in Yosemite National Park that descends along the south wall of Yosemite Valley from Glacier Point, past several major waterfalls, to Happy Isles. The trail derives its name from the panoramic vistas visible along the route, most notably Panorama Point.

References

  1. "John Muir and Pacific Crest Trails". NPS.gov. Retrieved 2008-05-08.
  2. PD-icon.svg This article incorporates public domain material from Happy Isles Bridge Removal Project Environmental Assessment. National Park Service. Archived from the original on 2009-08-16. Retrieved 2009-10-17.