44 mi of trail, end to end · about 6,500 ft of climbing · 6,337 ft–10,571 ft · native material surface · trail No. 813 · trail class 2 · typical grade 5-8% · hiking, horse, bike · seasonal: hiking 05/31-12/01
TrailheadVacas Trail/San Gregorio Lake Trailhead #51 9,249 ft Drive there
Vacas Trail/San Gregorio Lake Trailhead #51 the Forest Service's write-up
No Fee · reservation required
At the trailhead is a 10-15 car parking lot with a toilet. The elevation here is 9,300 ft. The climb into the San Pedro Parks Wilderness is gradual. San Gregorio Reservoir is about a mile from the trailhead. From the reservoir to trail #50 (Palomas) terminus is approximately 4 miles. The trail then crosses the terminus of Trail#435 (Anastacio) in about a quarter of a mile. The trail then proceeds to the terminus of trail #32 (Penas Negras) in about 2.5 miles, and from there San Pedro Park is about a half mile. The trail passes mostly through spruce type vegetation with occasional openings. Water is abundant along the trail.
Motorized and mechanized use is prohibited in Wilderness.
The lines are the US Forest Service's National Forest System trails layer (public domain), read 2026-10-16 and simplified for the map; the length is the line's, end to end, and the class, surface, grade and tread width are the forest's own entries where it publishes them - a forest that publishes the centreline alone has none. The trailheads and the points along the way are the Service's recreation points, and the write-ups its own recarea text, unedited. Heights come from USGS 3DEP through Terrain Tiles on AWS (Mapzen/Tilezen), read along each line and rounded; a short trail on steep ground can be off by a few tens of feet. Closures change: check the forest's own site before you go.
