Flattop Mountain, Two Rivers Lake, Lake Helene, Odessa Lake and Bear Lake-Bierstadt Loop Trail

The Flattop Mountain, Two Rivers Lake, Lake Helene, Odessa Lake and Bear Lake-Bierstadt Loop Trail is a 20.7 km looped trail that starts and ends in Estes Park, Larimer County, Colorado. Based on our data, the hike is graded as Medium. For information on how we grade trails, please read measuring the difficulty of a hiking trail on hiiker. Also, check our latest community posts for trail updates. This hike can be completed in approx 5 hrs 47 mins. Caution is advised on trail times as this depends on multiple variables. For more info read about how we calculate hike time.