Beginning at an elevation of 10,300 feet, the Jarosa Trail follows La Manga Creek through subalpine forest and meadows, passing numerous beaver ponds popular for fishing. The trail is moderately steep as it climbs to the rim of Jarosa Mesa. One reaches timberline at approximately 11,400 feet, where the La Manga valley opens into the gently rolling tundra of Jarosa Mesa.
The mesa reaches an elevation bordering the alpine and subalpine ecosystems here. Tundra vegetation predominates, but gnarled spruce and fir are scattered across the mesa as they cling to survival against the harsh winds. In protected locations, such as the bowl in which Red Lake sits, subalpine forests are found.
From this point in the South San Juan Wilderness, spectacular views of the Continental Divide and of the Elk Creek and Los Pinos drainages are available at the mesa top. Red Lake, sitting in a bowl at the head of the Rito Colorado, is popular for fishing and camping. Attractive campsites are abundant, and water is available along the entire route. Drinking water should be treated before consumption.
Wildlife species that may be seen on Jarosa Mesa include elk, which summer above tree line, marmot, pika, ptarmigan and coyote.
The South San Juan Wilderness is at the top of Jarosa Mesa. Beyond this point motorized equipment is prohibited.
The La Manga Camping area where the trail begins, is an undeveloped campground. No facilities are provided and campers must pack out their own trash. Parking is available.
Directions from Highway 17: Follow Highway 17 to its junction with Forest Road #114, one-half mile south of the summit of La Manga Pass. Follow Road #114 approximately one mile to the La Manga camping area, where parking is on the south side of La Manga Creek.
May through October .