Facility · California ·
Managed by the USDA Forest Service
Stanislaus National Forest (NF) · Open Access
The Mosquito Lakes Trailhead can be used to access Heiser Lake and Bull Run Lake. From Bull Run Lake, the trail continues to the Stanislaus Meadow Trailhead parking area.
Shortly after the trailhead, the Emigrant/Mokelumne Coast to Crest Trail (MCCT) branches off to the right and a short distance later the Mosquito Lakes to Pacific Valley/MCCT Trail branches off to the left. The Mosquito Lakes to Pacific Valley portion of the MCCT was completed in 2015; since it is a new trail, it may not be shown on some maps. As of September 2020, the map on this web page did not show the trail; however, trailhead symbols show the beginning and ending points. Please visit the Mokelumne Coast to Crest Trail website for more information and a map.
Lat/Long: 38.515315, -119.914940
From the Calaveras Ranger District head east on Highway 4 for about 40 miles. The trail begins on the southwestern tip of Mosquito Lakes.
38.51532, -119.91494 · 38°30'55.1"N 119°54'53.8"W
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| High °F | — | — | — | — | — | — | — | — | — | — | — | — |
| Low °F | — | — | — | — | — | — | — | — | — | — | — | — |
| Precip in | 7.6 | 6.9 | 6.3 | 4.1 | 2.2 | 0.8 | 0.5 | 0.3 | 0.7 | 2.2 | 4.1 | 7.1 |
1991–2020 averages from the nearest NOAA station, 6.5 mi away — not measured at the facility itself, and elevation can make a real difference over that distance.
Recreation.gov last updated this record on 2026-02-25.
Facility information and photographs from Recreation.gov (RIDB). SpotOpened is not affiliated with Recreation.gov or any federal agency.
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