Boulder-Grand Pass Trail (unmaintained) is a hiking trail in Grand County and Boulder County, Colorado. It is within Rocky Mountain National Park. It is 1.4 miles long and begins at 10,597 feet altitude. Traveling the entire trail is three miles with a total elevation gain of 1,569 feet. The Thunder Lake and Lake of Many Winds (elevation 11,634 feet) waters can be seen along the trail. The trail ends near the Boulder-Grand Pass (elevation 12,077 feet) saddle.
Sign in/up to upload photos.