Portland: Triangulation Peak

Catch an awe-inspiring view or Mt. Jefferson, among other classic Cascades peaks, from the summit of a glacier-carved mountain on this 5-mile out-and-back.
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Catch an awe-inspiring view or Mt. Jefferson, among other classic Cascades peaks, from the summit of a glacier-carved mountain on this 5-mile out-and-back.

Trail Facts

  • Distance: 4.0

Waypoints

Summit

Location: 44.7180824279785, -121.924781799316

Rocking views from Triangulation's airy summit
© Jim Scott

Trailhead

Location: 44.7213478088379, -121.948707580566

A weathered sign marks the trailhead
© Jim Scott

Spire Rock

Location: 44.7228126525879, -121.924385070801

Spire Rock, a craggy, finger-like formation east of the trail
© Jim Scott

TRP002

Location: 44.7182807922363, -121.942520141602

First glimpse of Spire Rock, a massive finger rising through thick pines; views N of Mt. Hood?s snowy top

TRP003

Location: 44.7159729003906, -121.938369750977

Cross first of several spring-fed trickles

TRP004

Location: 44.7195625305176, -121.93335723877

Distant views of Mt. Hood through canopy along this stretch; summer berries and columbine attract birds, foragers

TRP005

Location: 44.7194862365723, -121.928504943848

Spire Rock emerges again from thick stands of Douglas fir, hemlock

TRP006

Location: 44.7208938598633, -121.925254821777

Stay R @ Y. Caution: Trail is sparse, easy to miss; bear N

TRP007

Location: 44.7223243713379, -121.924873352051

From base of Spire Rock, begin hiking series of switchbacks wrapping around SW side

TRP008

Location: 44.7218856811523, -121.923820495605

After topping a gentle, tree-cloaked ridge, turn R following trail

TRP009

Location: 44.7182884216309, -121.923934936523

Stay on faint trail, veering R to circle the small, rocky summit marked by a few deteriorating stairs, which once led to a lookout tower

TRP010

Location: 44.7178802490234, -121.925003051758

Triangulation Peak (5,434 ft.); excellent views of Mt. Hood, Mt. Jefferson, Three-Fingered Jack, and the Three Sisters. Don?t miss: Hike 200 ft. NE to 60-ft.-high-Boca Cave; then retrace steps to trailhead