The pyramid like North Face of Williams Peak towers over the Sawtooth Valley and is the 6th highest peak in the Sawtooth Range. Although you can take a trail for 3.5 of the approximate 5 miles (one way), the summit sees few visits each year. The Sawtooths highest peak, Thompson (10,751 ft), sits just .75 miles south-southwest of Williams. The two peaks together make impressive guardians to the Sawtooth backcountry and provided a stunning backdrop for the valley's largest town, Stanley (Population 100). The peak is quite accessible in Sawtooth terms, located just 5.5 miles southwest of the Stanley, Idaho and just 5 miles from the Redfish Lake Lodge. The mountain's southern slopes and ridgelines offer challenging and exciting scrambling, while the steep North Face offers the peak's classic alpine climb with over 1100 feet or 9 pitches of steep climbing..

The impressive East Ridge of Thompson as viewed from Williams
Here are some of the known routes:
1) The June/ North Couloir (III 5.7) - This prominent steep couloir cuts up the northeast face to a notch just below the summit. It's fairly easy access from the Alpine Way Trail trail near Marshall Lake. The couloir often has ice, rock, and snow and is blocked by a large cornice in the winter near the top. The first ascent came in 1986 by Kirk Bachman and B. Franklin.
Rope up at the base of the couloir and expect highly variable conditions on snow and ice. The route is straight-forward. At the top of the couloir, follow the ridge to the west and then the south to the summit. It's only 400 feet from the top of the couloir to the summit proper. The easiest descent is to utilize the south facing routes to get back to the trail.
2) Southeast Slopes (Class 3) - Easy access from the Alpine Way Trail make this method probably the easiest and quickest route on the mountain. Winter time offers great snow climbing and ski descents here.
3) East Ridge (Class 4) - A more challenging route involves up and down scrambling on the prominent southeast ridge above the Southeast Slopes route. There are sections of extreme exposure and steep, loose gullies to cross over. Mountain Goats were encountered on this route.
4) Southwest Couloir (Class 3) - This route is readily accessible from the Thompson / Williams Saddle (Thompson and Williams can be done together) or the Lake 8865 area.
The peak is named after Dave Williams, an early rancher who also delivered the mail from Stanley to Galena (the Sun Valley area). He is credited with the first known ascent of the peak in 1934 along with Robert and Miriam Underhill.

Snowy winter morning on the Sawtooths
3) Off Belay: The Mountain Magazine Feb 1975 #19 (Whole issue devoted to rock climbing in the Sawtooths, but hard to find)