Little Willow Lake to Terminal Geyser Trail

This out-and-back links Little Willow Lake with Terminal Geyser over about 3.2 miles round trip from the mapped trailhead. A short path from the road-end campground reaches the Pacific Crest Trail, then a spur drops to the steam vent. Plan about 2 to 2.5 hours. A 2.6-mile lakeside distance is also published; this measurement includes the mapped access link to the PCT and the same route back. It is the shorter approach compared with the separate 5.8-mile Warner Valley route.

Willow Lake sits in a rare sphagnum fen, with floating moss mats that can be more than two feet thick. The Forest Service warns that footing near the lake can be spongy and uneven, and asks visitors to stay off the fen and its unusual plants. American scheuchzeria, once thought eliminated from California after Lake Almanor formed, was rediscovered here in 1988; English and roundleaf sundews also grow around the lake.

From the trailhead, follow the access path to the PCT by the lake's upper shore. The route climbs to a high point, then descends toward the geyser basin; on the return, you climb back through the same rolling ground. The mapped profile reaches roughly 6,365 feet before dropping to about 5,970 feet at the vent, so the short mileage still includes a real climb.

Terminal Geyser is a steam vent, not a true erupting geyser. The plume rising over the rocky basin is the payoff and the natural photo stop; stay on the established trail for the view. Hydrothermal crust can look solid while hiding acidic boiling pools or mud, so do not walk closer to the steam or across pale ground. The trail crosses Dixie Fire-affected forest, where standing dead trees can fall without warning. Pets are not allowed on the hiking trail inside the national park.