Alder Creek-Mosquito Creek Trailhead
Trailhead · Yosemite corridor
Alder Creek-Mosquito Creek Trailhead sits at 4997 feet in Yosemite's Sierra Nevada corridor. This moderate-elevation entry point sees light traffic and stable spring conditions ideal for early-season hiking.
Wind averages 6 mph but can gust to 19 mph, mostly in afternoons. Temperatures run cool year-round, hovering near 44 degrees through spring. Morning calm windows open early; plan creek crossings and exposed traverses before mid-morning wind builds.
The 30-day average score of 16.0 reflects reliable early-season stability. Expect temperatures to climb from the current 44-degree average as late spring advances. Wind typically stays light in mornings and builds afternoon; the 30-day max of 19 mph marks the ceiling for this exposed drainage. Crowding remains minimal at 13 people on average, making weekday visits nearly solitary.
30 days back / 7 days forward
Today's score by factor
About Alder Creek-Mosquito Creek Trailhead
Alder Creek-Mosquito Creek Trailhead accesses high-country creek drainages in the Yosemite corridor of California's Sierra Nevada, sitting at the intersection of two primary water systems. The trailhead lies east of Highway 120 and south of Tioga Pass in the eastern Sierra zone. Access from the west requires a 1.5 to 2 hour drive from Yosemite Village via Highway 120 east; from the east, Lee Vining or June Lake serve as primary gateways. The low base popularity (0.4) means parking pressure is minimal even on weekends, and the moderate 4997-foot elevation makes it accessible most of the year without technical snow knowledge.
Spring and early summer conditions dominate at this elevation. The 30-day average temperature of 44 degrees and rolling 90-day average of 44 degrees show consistent cool spring character; overnight lows regularly touch 33 degrees, so insulation layers are mandatory even in daylight. Wind averaging 6 mph over the last month is light relative to higher peaks, but afternoon acceleration to 19 mph (the 30-day max) funnels through the creek drainages, especially on clear days. Crowding at 13 average visitors poses no logistical challenge. Late September through early October brings warmer temps and lower afternoon wind, but access becomes weather-dependent as snow can block higher passes. Winter and very early spring are snow-dominated; check Highway 120 closure status before committing.
This trailhead suits backcountry hikers comfortable with creek navigation and moderate elevation gain. Day-hikers typically tackle the Alder Creek or Mosquito Creek drainages as half-day or full-day loops, returning before afternoon wind peaks. Early starters (heading out by 7 am) avoid the main wind window and reach alpine meadows in stable air. Creek crossings can run high in snowmelt season (May through June); timing your trip for lower flow saves hours of bushwhacking. Experienced Sierra travelers know to skip afternoon starts on windy days; morning conditions at 4997 feet are dramatically calmer than the exposed peaks immediately south and east.
Nearby alternatives include Cathedral Lakes Trailhead and Glen Aulin Trailhead, both accessed via Highway 120 but offering different drainage systems and crowd profiles. Cathedral Lakes draws moderate traffic and sits at similar elevation but on the Tuolumne River system. Glen Aulin is busier and lower elevation, favored by valley visitors. Alder Creek-Mosquito Creek remains the quietest and most creek-focused of the Yosemite corridor high-country entries, making it ideal for solitude seekers and those specifically targeting riparian ecosystems.