Sugaloaf Peak, Ontario Peak, and Bighorn Peak Loop via Falling Rock Canyon

July 18th, 2025 at 6:35 AMCucamonga Wilderness, CA

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Info

Distance11.7 mi

Elevation gain4,600 ft

CruxClass 2

Route typeLoop

Duration6 hr

Quality6/10

Vehicle to trailheadCar

EcoregionSouthern and Baja California Pine-Oak Mountains

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Sugaloaf Peak, Ontario Peak, and Bighorn Peak Loop via Falling Rock Canyon — Icehouse Canyon Trailhead.

Sugaloaf Peak, Ontario Peak, and Bighorn Peak Loop via Falling Rock Canyon

Sugaloaf Peak, Ontario Peak, and Bighorn Peak Loop via Falling Rock Canyon

Sugaloaf Peak, Ontario Peak, and Bighorn Peak Loop via Falling Rock Canyon — Crossing Icehouse Creek en route to Falling Rock Canyon.

Sugaloaf Peak, Ontario Peak, and Bighorn Peak Loop via Falling Rock Canyon — Starting up Falling Rock Canyon.

Sugaloaf Peak, Ontario Peak, and Bighorn Peak Loop via Falling Rock Canyon — View back.

Sugaloaf Peak, Ontario Peak, and Bighorn Peak Loop via Falling Rock Canyon — Fork in the canyon. Stay right.

Sugaloaf Peak, Ontario Peak, and Bighorn Peak Loop via Falling Rock Canyon — Painted green dots (of dubious origin) indicate the route.

Sugaloaf Peak, Ontario Peak, and Bighorn Peak Loop via Falling Rock Canyon

Sugaloaf Peak, Ontario Peak, and Bighorn Peak Loop via Falling Rock Canyon — View back.

Sugaloaf Peak, Ontario Peak, and Bighorn Peak Loop via Falling Rock Canyon

Sugaloaf Peak, Ontario Peak, and Bighorn Peak Loop via Falling Rock Canyon — The grade lessens around 6,000 feet.

Sugaloaf Peak, Ontario Peak, and Bighorn Peak Loop via Falling Rock Canyon — Exiting Falling Rock Canyon for a slope to the right.

Sugaloaf Peak, Ontario Peak, and Bighorn Peak Loop via Falling Rock Canyon — View back.

Sugaloaf Peak, Ontario Peak, and Bighorn Peak Loop via Falling Rock Canyon — Climbing the talus slope to the saddle between Sugarloaf Peak and Ontario Peak.

Sugaloaf Peak, Ontario Peak, and Bighorn Peak Loop via Falling Rock Canyon — View back. Mount Baldy is on the far left, Telegraph Peak on the far right.

Sugaloaf Peak, Ontario Peak, and Bighorn Peak Loop via Falling Rock Canyon — Approaching the saddle.

Sugaloaf Peak, Ontario Peak, and Bighorn Peak Loop via Falling Rock Canyon — Along Sugarloaf Peak's east ridge. The true summit is on the left, past the false summit ahead.

Sugaloaf Peak, Ontario Peak, and Bighorn Peak Loop via Falling Rock Canyon — View toward Sugarloaf Peak from the false summit.

Sugaloaf Peak, Ontario Peak, and Bighorn Peak Loop via Falling Rock Canyon — Following a use trail to the true summit.

Sugaloaf Peak, Ontario Peak, and Bighorn Peak Loop via Falling Rock Canyon

Sugaloaf Peak, Ontario Peak, and Bighorn Peak Loop via Falling Rock Canyon — View back. In the distance are the three namesake peaks of the popular "Three T's" trek: Thunder Mountain, Telegraph Peak, and Timber Mountain.

Sugaloaf Peak, Ontario Peak, and Bighorn Peak Loop via Falling Rock Canyon — Sugarloaf Peak summit.

Sugaloaf Peak, Ontario Peak, and Bighorn Peak Loop via Falling Rock Canyon — View north toward Mount Baldy (right) and Telegraph Peak (left).

Sugaloaf Peak, Ontario Peak, and Bighorn Peak Loop via Falling Rock Canyon — View south toward Ontario Peak, my next destination.

Sugaloaf Peak, Ontario Peak, and Bighorn Peak Loop via Falling Rock Canyon — Returning along the use trail to the Sugarloaf-Ontario saddle.

Sugaloaf Peak, Ontario Peak, and Bighorn Peak Loop via Falling Rock Canyon

Sugaloaf Peak, Ontario Peak, and Bighorn Peak Loop via Falling Rock Canyon — Starting up Ontario Peak's north slope.

Sugaloaf Peak, Ontario Peak, and Bighorn Peak Loop via Falling Rock Canyon — View back toward the Sugarloaf-Ontario saddle.

Sugaloaf Peak, Ontario Peak, and Bighorn Peak Loop via Falling Rock Canyon

Sugaloaf Peak, Ontario Peak, and Bighorn Peak Loop via Falling Rock Canyon

Sugaloaf Peak, Ontario Peak, and Bighorn Peak Loop via Falling Rock Canyon — View back toward Mount Baldy.

Sugaloaf Peak, Ontario Peak, and Bighorn Peak Loop via Falling Rock Canyon

Sugaloaf Peak, Ontario Peak, and Bighorn Peak Loop via Falling Rock Canyon — Ontario Peak comes into view on the right.

Sugaloaf Peak, Ontario Peak, and Bighorn Peak Loop via Falling Rock Canyon — View back.

Sugaloaf Peak, Ontario Peak, and Bighorn Peak Loop via Falling Rock Canyon — Joining the Ontario Peak Trail.

Sugaloaf Peak, Ontario Peak, and Bighorn Peak Loop via Falling Rock Canyon

Sugaloaf Peak, Ontario Peak, and Bighorn Peak Loop via Falling Rock Canyon — Ontario Peak summit. View southwest.

Sugaloaf Peak, Ontario Peak, and Bighorn Peak Loop via Falling Rock Canyon — View east along the ridge to Bighorn Peak (right of center).

Sugaloaf Peak, Ontario Peak, and Bighorn Peak Loop via Falling Rock Canyon — Headed east along the Ontario Peak Trail.

Sugaloaf Peak, Ontario Peak, and Bighorn Peak Loop via Falling Rock Canyon — View north toward Mount Baldy.

Sugaloaf Peak, Ontario Peak, and Bighorn Peak Loop via Falling Rock Canyon — View back toward Ontario Peak.

Sugaloaf Peak, Ontario Peak, and Bighorn Peak Loop via Falling Rock Canyon

Sugaloaf Peak, Ontario Peak, and Bighorn Peak Loop via Falling Rock Canyon

Sugaloaf Peak, Ontario Peak, and Bighorn Peak Loop via Falling Rock Canyon

Sugaloaf Peak, Ontario Peak, and Bighorn Peak Loop via Falling Rock Canyon — Turnoff for Bighorn Peak.

Sugaloaf Peak, Ontario Peak, and Bighorn Peak Loop via Falling Rock Canyon — Along a spur trail to Bighorn Peak.

Sugaloaf Peak, Ontario Peak, and Bighorn Peak Loop via Falling Rock Canyon — View back.

Sugaloaf Peak, Ontario Peak, and Bighorn Peak Loop via Falling Rock Canyon

Sugaloaf Peak, Ontario Peak, and Bighorn Peak Loop via Falling Rock Canyon — Approaching Bighorn Peak's west slope.

Sugaloaf Peak, Ontario Peak, and Bighorn Peak Loop via Falling Rock Canyon

Sugaloaf Peak, Ontario Peak, and Bighorn Peak Loop via Falling Rock Canyon — View back toward Ontario Peak.

Sugaloaf Peak, Ontario Peak, and Bighorn Peak Loop via Falling Rock Canyon

Sugaloaf Peak, Ontario Peak, and Bighorn Peak Loop via Falling Rock Canyon — Bighorn Peak summit.

Sugaloaf Peak, Ontario Peak, and Bighorn Peak Loop via Falling Rock Canyon — Continuing along Bighorn Peak's east ridge. Cucamonga Peak looms to the south.

Sugaloaf Peak, Ontario Peak, and Bighorn Peak Loop via Falling Rock Canyon

Sugaloaf Peak, Ontario Peak, and Bighorn Peak Loop via Falling Rock Canyon — Descending Bighorn Peak's north slope.

Sugaloaf Peak, Ontario Peak, and Bighorn Peak Loop via Falling Rock Canyon

Sugaloaf Peak, Ontario Peak, and Bighorn Peak Loop via Falling Rock Canyon — Rejoining the Ontario Peak Trail near Icehouse Saddle (right).

Sugaloaf Peak, Ontario Peak, and Bighorn Peak Loop via Falling Rock Canyon — Along the Icehouse Canyon Trail.

Sugaloaf Peak, Ontario Peak, and Bighorn Peak Loop via Falling Rock Canyon

Sugaloaf Peak, Ontario Peak, and Bighorn Peak Loop via Falling Rock Canyon — Joining the Chapman Trail, a slightly longer but more scenic route back to Icehouse Canyon Trailhead.

Sugaloaf Peak, Ontario Peak, and Bighorn Peak Loop via Falling Rock Canyon

Sugaloaf Peak, Ontario Peak, and Bighorn Peak Loop via Falling Rock Canyon

Sugaloaf Peak, Ontario Peak, and Bighorn Peak Loop via Falling Rock Canyon

Sugaloaf Peak, Ontario Peak, and Bighorn Peak Loop via Falling Rock Canyon — Approaching Cedar Glen Campground.

Sugaloaf Peak, Ontario Peak, and Bighorn Peak Loop via Falling Rock Canyon

Sugaloaf Peak, Ontario Peak, and Bighorn Peak Loop via Falling Rock Canyon — View along Cedar Canyon. The Sugarloaf-Ontario saddle is clearly visible, left of center.

Sugaloaf Peak, Ontario Peak, and Bighorn Peak Loop via Falling Rock Canyon

Sugaloaf Peak, Ontario Peak, and Bighorn Peak Loop via Falling Rock Canyon

Sugaloaf Peak, Ontario Peak, and Bighorn Peak Loop via Falling Rock Canyon

Sugaloaf Peak, Ontario Peak, and Bighorn Peak Loop via Falling Rock Canyon — Returning to Icehouse Canyon.

Sugaloaf Peak, Ontario Peak, and Bighorn Peak Loop via Falling Rock Canyon — Rejoining the Icehouse Canyon Trail about a mile from the trailhead.