Thompson Peak, Mountain summit in Trinity County, California, US

Thompson Peak is the highest summit of the Trinity Mountains, a range within the Klamath Mountains of Trinity County, northern California. It also appears under the names Sawtooth Peak and Thompsons Peak. The mountain rises above Grizzly Lake, which lies to its north at the foot of the peak and feeds Grizzly Lake Falls, a waterfall 76 m high.

Thompson Peak is the highest summit of the Trinity Alps, a range within the Klamath Mountains of Trinity County. The sources record no founding date or event for the peak itself; its recorded history is one of naming, as it also appears as Sawtooth Peak and Thompsons Peak. It now lies within Shasta-Trinity National Forest.

The peak's alternate names, Sawtooth Peak and Thompsons Peak, appear alongside Thompson Peak in records of the Trinity Mountains. Grizzly Lake, at the mountain's northern foot, and its 76-metre Grizzly Lake Falls are the landmarks hikers name when describing the route to the summit.

The route to the summit follows the trail around Grizzly Lake, which lies north at the foot of the mountain; the lake's outflow forms Grizzly Lake Falls, a 76 m waterfall. The peak stands in Shasta-Trinity National Forest. Plan for changing mountain weather and carry your own water.

Snow fields on the north face persist through summer and feed waterfalls that pour into Grizzly Lake below. These water flows decrease or vanish entirely during drier seasons.