Mount Heinen
Mount Heinen, 6,336 feet (Class 2)
Standard Route: South East Ridge
This peak is a great early season hike. The peak is located on the northwest side of Arrowrock Reservoir. Climb the peak from the reservoir. Park just north of the Irish Creek Boat Ramp. A motorcycle track can be viewed from this spot climbing up the steep slopes to the west. Follow this track up and to the northeast toward point 6137. This route follows a fire break until just south of Point 6137. Traverse around Point 6137 and then continue north along the ridge that leads to Mount Heinen. This is a long, strenuous route. Take lots of water. See (C) Middle Fork Boise River Road Approaches on page 154 for access information. Map and photos below.
USGS Dunnigan Creek, Arrowrock Reservoir NE, Grape Mountain
Approaching Point 5402.
View of the summit from near the top of Point 5402.
View looking toward the summit from the low point between
Point 5402 and the summit.
Looking back down the ridge.
The Trinity / Lava Mountain area from the summit.
