This steep, minimally maintained trail takes you to a scenic lake popular for fishing and surrounded by a few campsites. The first half mile follow an old road and at about one mile enter old forest and the Glacier Peak Wilderness. Some parts of the trail are very difficult, steep and not clearly defined. The trail follows Tenas Creek on the right for the first two miles. Near the wilderness boundary the trail trends left and upslope away from the creek, eventually entering a large meadow with Tenas Creek below. Proceed north until crossing the rocky outfall of Boulder Lake and the headwaters of Tenas Creek. The outfall of Bolder Lake is often hidden in the steep boulder field. After crossing the creek, ascend steeply to the northeast until you are climbing a steep, rocky scramble. Once at the steeply walled lake find a few good campsites on the left where you cross the outflow of the lake again. Boulder Lake is in a fragile high-alpine environment dominated by snow nine months of the year. Plants and trees grow very slowly. Please take care to leave no trace and pack out what you bring in.
From the Darrington Ranger District drive north on State Highway 530 seven miles to the Suiattle River Road 26. Follow this road eight miles to Tenas Creek Road 2660. Drive seven miles to the end of Tenas Creek Road where parking is available at the trailhead.