Hetch Hetchy Backpackers Campground
Campground · Yosemite corridor
Hetch Hetchy Backpackers Campground sits at 3967 feet in the Yosemite corridor, anchoring access to the Hetch Hetchy Reservoir and high-Sierra backcountry. Calmer than the open lake basin to the east.
Wind funnels off the reservoir in afternoon surges; mornings are typically still. The 30-day average wind of 6 mph masks daily swings from calm to 18 mph. Water-reflected heat warms afternoons; elevation keeps nights cool even in summer.
Over the past month, Hetch Hetchy Backpackers Campground averaged a NoGo Score of 15 with temperatures around 47 degrees and the 30-day average wind of 6 mph, though gusts reached 18 mph. The week ahead shows typical spring variability; plan morning trips to avoid afternoon wind and afternoon crowding on weekends.
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About Hetch Hetchy Backpackers Campground
Hetch Hetchy Backpackers Campground serves as the primary staging point for backpackers entering the Yosemite high country via the Hetch Hetchy corridor. Located at 3967 feet on the north shore of Hetch Hetchy Reservoir, the campground sits roughly 12 miles north of the Highway 120 junction near Mather. Access is via Highway 120 east from the Bay Area (Stockton is the nearest major hub); the drive through the Sierra Nevada foothills takes 3 to 4 hours from the valley floor. The reservoir itself is a glacially-carved basin fed by snowmelt from the Tuolumne River drainage; the campground occupies a relatively exposed bench above the water, making it the logical jump-off for backcountry permits and multi-day loops into the Grand Canyon of the Tuolumne.
Spring and early summer bring snowmelt surges; the reservoir level rises sharply from late April through June. Average temperatures over the past 30 days have been 47 degrees, typical for mid-spring at this elevation. Wind patterns are pronounced; the 30-day average wind speed of 6 mph climbs to sustained afternoon gusts as thermals wake in the reservoir basin. Mornings are sheltered and cool. By mid-June, afternoon thermaling strengthens; expect consistent winds pushing 10 to 15 mph after noon. Fall reverses this pattern; September and October see calmer afternoons and colder mornings (the year-round minimum temperature is 20 degrees Fahrenheit). Winter road conditions determine access; Highway 120 closes for extended periods. The 30-day crowding average of 12 jumps sharply on weekends in summer and around holiday weekends.
Hetch Hetchy Backpackers Campground is built for self-supported backpackers and mountaineers planning multi-day Sierra traverses. The site appeals to experienced hikers comfortable with alpine exposure and water-crossing logistics; it is not a destination for car camping or day-hiking families. Most visitors arrive with pre-arranged backcountry permits and supply resupply plans. Parking fills early on weekends; weekday mornings from Tuesday to Thursday offer the calmest conditions and lowest crowding. Afternoon wind is the primary operational constraint; backcountry routes exposed to the reservoir-driven airflow are notoriously windy by 2 PM. Water treatment is mandatory; the reservoir is not potable untreated. Winter visitors should expect snow, ice, and marginal road access; the campground is snow-covered above 4000 feet for much of December through March.
The Hetch Hetchy corridor competes with Yosemite Valley (lower elevation, warmer, more crowded) and the Tuolumne Meadows region (higher elevation, colder, more alpine). Nearby backpacking staging points include the Wailowa-Wallowa trailhead near Highway 120 and the Tenaya Lake day-use area to the south. The high-Sierra passes immediately north (Matterhorn, Tower Peak) are accessed from this campground; those routes see the heaviest afternoon wind. Paddlers aiming for the reservoir itself find the water colder than Tahoe and the wind regime more unpredictable due to the narrow gorge geography. Head here on calm mornings; skip the afternoon if you're wind-sensitive or paddling.