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This peak is not in the book. Based on recent LiDAR measurements, the correct elevation is 8,894 feet rather than the 8,889 feet shown on the USGS quad. Published October 2025

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This beautiful peak is the northernmost summit on the Trinity Mountain crest. It is located east of Big Trinity Lake. Several impressive granite fins culminate with the largest fin which has the high point. After attempting this peak and, despite two people registering ascents on LOJ, I believe that no one has reached its true summit, which is an exposed tower. I will discuss this belief in the route description below. USGS Trinity Mountain

Access

Featherville, Idaho Access. At the south end of Featherville, turn onto FSR-172 which is signed for Trinity Lakes. Follow FSR-172 for 15 miles to its junction with FSR-129/Trinity Ridge Road. Turn left/south and follow the road past the various Trinity Lakes and then to the pass between Trinity Mountain and Peak 9037 in 5.0 miles. At the pass, turn left onto a rough road that leads east for 0.25 miles to the closed gate. There is parking for up to four vehicles near the gate.

These roads do get regular maintenance and I have spotted passengers cars on them. Nevertheless, the quality and steepness vary and they can be quite rough in places. A high-clearance vehicle with AT tires is always recommended on road in the Boise mountains. Follow the road to the [signed] Big Trinity Lake Campground turn. Drop down to the lake and follow the road along its northern side to the Rainbow Lakes Trailhead.

Southern  Access. FSR-129/Trinity Ridge Road [(E)(2.2) on Page 155] leads up from Anderson Ranch Reservoir to the pass between Trinity Mountain and Peak 9037. It is a rough road that is often in need of major repairs. A 4WD is required. Cross the pass and descend the [signed] Big Trinity Lake Campground turn. Drop down to the lake and follow the road along its northern side to the Rainbow Lakes Trailhead.

The Approach

From the trailhead, follow a good trail to the saddle between Fiddlers Perch and Peak 8889. The first section of the trail goes through an old burn and, as a result, there will be some deadfall. Nevertheless, this is a good trail that reaches the saddle in roughly a mile. Leave the trail and climb north up the steep, broad ridge. Pass the first ridge bump on its east side. Once past the bump, the broad ridge is covered by beautiful meadows. You will soon have a view of the summit fin as well as other impressive outcrops. Note (1) that the USGS quad erroneously shows the trail beginning on the south side of the lake and (2) the most recent USFS map does not even show the trail.

North Ridge, Class 5

Ridge Baldner claimed the first ascent. He wrote a trip report and published it on peakbagger. Baldner wrote in pertinent part “We made our way to the northern side of the high point and found a decent little ‘chute’ to scramble up. Once up on the rock, the high point is just a short walk back in a southern direction (A few Class 3 moves).” On October 10, 2025 Alex Feldman, Steve Grantham, Michael Pelton and I followed this advice to the peaks north ridge. We climbed up ridge via some easy bouldering on granite slabs. There is a register left by John Fredland in this area. The slabs top out on an exposed knife edge ridge which as Baldner states leads to a high point. However, the high point is not the true summit. We followed the knife edge a short distance where we encountered high point separated from the true summit by a small notch. The true summit rises vertically out of the notch. We backtracked a short distance to a false summit. Derek Percoski evaluated the peak using LiDAR date and determined that “the southernmost tower (43.61990851,-115.41270428) is 2.5′ taller than the one 70′ to the north.”  But I read your TR and it sounds like you didn’t have any doubts on which point was higher. Relying upon the Baldner ‘Class 3’ rating, we did not bring any technical gear. As you will see from the photo below, the tower is basically a short, but difficult, exposed bouldering problem with its difficulty increased by at least a 50-foot drop on three sides. Clearly, the summit tower is not Class 3. Therefore, I believe, based on Baldner’s description and the difficulty of the summit tower, that the peak has not been climbed. So we reversed our route and, without success, looked for another nontechnical route up the tower.