Fodor's Expert Review Chasm Lake Trail

Nestled in the shadow of Longs Peak and Mt. Meeker, Chasm Lake offers one of Colorado's most impressive backdrops, which also means you can expect to encounter plenty of other hikers on the way. The 4.2-mile Chasm Lake Trail, reached via the Longs Peak Trail, has a 2,360-foot elevation gain. Just before the lake, you'll need to climb a small rock ledge, which can be a bit of a challenge for the less sure-footed; follow the cairns for the most straightforward route. Once atop the ledge, you'll catch your first memorable view of the lake. Difficult.