Elevation: 9,380 ft
Climbing and access information for this peak is on Page 332 of the book. Published November 2020
Reas Peak is located on the Continental Divide in the Eastern Centennials. It sits above Hell Roaring Canyon (MT), Blue Creek (ID), and Dry Creek (ID). Mount Jefferson is due north across Hell Roaring Canyon. The Continental Divide goes east from Reas Peak, turns sharply north, then turns sharply west to cross Mount Jefferson. Looking north from Reas Peak, you are looking into Montana but, behind Mount Jefferson, it’s Idaho again. Strange state boundaries, indeed. USGS Mount Jefferson
Sawtell Peak Road/FSR-024 is signed as “Lower Loop Road” at its junction with US-20 north of Island Park. This junction is just north of Macks Inn and is 5.1 miles north of the Yale-Kilgore Road on US-20. Ignore the street/road name since it changes as you drive westward. The [signed] Sawtell Peak trailhead is 9.7 miles up Sawtell Peak Road from US-20. Park at the Sawtell Peak trailhead (9,030 feet).
The Approach, Class 2
From the Sawtell Peak trailhead, follow FST-165/Rock Creek Basin Trail for 1.5 miles to a shoulder crossing on the south side of Peak 9500. Leave FST-165 here and follow the shoulder south in open or semi-open terrain on easy grass/scrub with some gravel/scree mixed in at times. The ridge drops to a saddle then climbs up over Point 9199 then drops to another saddle northwest of Point 9130.
Skirt the west side of Point 9130 to reach the head of a gully at the saddle that separates Point 9130 from Point 9204. From this saddle, scramble diagonally left/west to skirt the north side of Point 9204 and reach the crest of the east ridge of Reas Peak just west of Point 9204. This requires a bushwhack across relatively easy pine forest and scree/gravel shoulders and gullies.
East Ridge, Class 2
Once on the Continental Divide just west of Point 9204, follow the undulating ridge crest west. Hike across some open gravel/scree humps and minor gullies to reach a forested ridgeline hump. The pika tunnels under the soft ground are rather annoying and will slow you down as your feet plunge into the airy ground. Stay on the ridge crest and go through or skirt the easy pine forest (not much blowdown). The terrain opens up again and the ridge bends left-ish/southwest to descend easy grass/scrub to a saddle.
Scramble up over a minor forested hump and drop to a second saddle of equal height. From this final saddle, follow an elk trail (initially) southwest up the semi-open ridge. Make a final right-ish/west bend to reach the gentle, open summit hump of Reas Peak. The small summit area has two small summit cairns. The ridge traverse from Point 9204 to the summit is just over two miles but it goes quickly.