From ID-93 turn off east onto DoubleSprings Pass Road at approximately 46 miles north of Arco. It will be approximately 25 miles to the trailhead from this turn off. Leave the DoubleSprings Pass at 9.5 miles with a hard right turn. Proceed on the most traveled road up and over HorseHeaven Pass and descend into Mahogany Creek (signed). Cross the stream (1 of 4 ) which may be several feet deep and ascend to the ridge. At approximately 13.9 from the DoubleSprings Pass Road turnoff you'll encounter a split. The right hand split ascends the West Fork of the Pahsimeroi River Valley. You'll take the left fork up the East Fork of the Pahsimeroi River Valley. Follow this road to the complete end for the SW Face route.
4WD is required for the spring creek crossings, short steep hills, and large rocks in the dirt roads.
Park as high up into the East Fork valley that you can and stay close and just above the river on the east side. Look for a small forested area that rises slightly into the SW Face (visible on the USGS map). Follow the tree band as high as it will go and then enter the scree field. Follow the few solid sections of limestone and angle slightly left as you rise up. Just under the summit you angle back to the right under a cliff band on the ridge and ideally exit at a small notch where you'll walk just east and south a few hundred feet to the true summit.