Snow Lake in Snoqualmie National Forest is the largest alpine lake in the Alpine Lakes Wilderness and one of the most celebrated day hikes in the Pacific Northwest. The 7.2-mile round trip from the Alpental base gains 1,800 feet to the lake basin below Chair Peak, where the clear water reflects the surrounding Cascade summits.
The trail's proximity to Seattle (about 50 miles east on I-90) combined with its quality scenery make it one of the most heavily used trails in Washington state. Plan accordingly: early arrivals, weekday visits, and realistic expectations about trail company are all worthwhile preparations.
The Route
The trail begins at the Alpental ski resort base and climbs steadily through forest before breaking above treeline onto the rocky approach to the lake basin. The lake comes into full view at the crest before the descent to its shoreline. Chair Peak rises directly behind the lake, providing a dramatic backdrop that is the scene's defining visual.
The lake basin has limited established campsites. Day hikers typically rest at the shoreline before returning on the same trail.
What to Expect
This trail requires realistic planning for its popularity. The parking lot fills well before 8 AM on summer weekends. The trailhead at Alpental has vault restrooms and good facilities, which contributes to the high traffic volume.
Dogs are not allowed. This is a firm requirement in the Alpine Lakes Wilderness and is actively enforced. Leave dogs at home or choose a different trail.
Wildflowers on the approach peak in late July and early August. The lake itself is cold and clear, and some hikers swim in late summer when temperatures are at their warmest.
Nearby
Snoqualmie Pass is directly at the trailhead area and provides a gas station, small restaurant, and lodging options. North Bend and Snoqualmie, about 25 miles west on I-90, provide full services as the nearest full-service communities to the Alpine Lakes trailheads.
Leave No Trace
This trail receives enough use that following Leave No Trace principles is important for preserving the experience for future visitors. Stay on the marked trail to prevent erosion. Pack out all waste. Avoid camping within 200 feet of water sources or the trail. Use existing fire rings only where campfires are permitted, and check current fire restrictions at checking conditions before you go before any visit. The trail and surrounding terrain remain in good condition because previous visitors have respected these norms.