The Tooth/Northeast Slab

A mixed snow, rock, and ice winter climb in the Alpine Lakes Wilderness near Snoqualmie Pass.


Take Exit 52 off of I-90 at Snoqualmie Pass, and turn northwest onto Alpental Road and follow it to the Alpental parking area (3,100 ft).


Hike from the parking lot up the valley on the left side of the creek, near Source Lake, ascending the snow finger into the basin. Then ascend snow slope to a gully marking the start of the climb. Be aware of avalanche conditions.


Pitch 1 climbs the gully, Pitch 2 continues to the ridge, Pitch 3 starts the ridge pitches from a tree anchor, Pitch 4 passes a rock prominence on the right, Pitch 5 traverses a snow and ice covered slab to a belay ledge, and the final pitch, Pitch 6, stays on the west side to the summit.

Note: Pitch 2 cannot be proteced and ia up to a 30m horizontal ascending traverse on 50°-60° slopes. It is dependent on having enough snow/ice coverage to get across.


Rappel the South Face climbing route.


Ice screws, pitons, pickets, alpine rock rack, ice tools.

information FOr leaders


As of 2017, the Snoqualmie Ranger District considers Mountaineers trips and courses to be "nominal use". Leaders should print and copy this designation letter to show rangers they may see on trail or carry a digital copy on their phone.

  • Difficulty: Intermediate Ice Climb
  • Length: 5.0 mi
  • Elevation Gain: 2,500 ft
  • 5,600 ft
  • Green Trails Snoqualmie Pass Gateway No. 207S
  • USGS Snoqualmie Pass
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