(Trailhead is shuttle bus accessible.) Definitely the most crowded hike given its difficulty in the entire park with good reason. The vast number of features along this hike make it a favorite of many with two waterfalls and three lakes surrounded by increasingly shear and spectacular mountains. If there seems to be a lot of people, do not be discouraged. Beyond Timberline Falls the number of hikers reduce, as many are turned away by the short scramble up the side of falls. The Hike leaves from the Glacier Gorge Trailhead and is 9 miles long.
(Trailhead is shuttle bus accessible.) A beautiful morning hike, this Lake is situated on top of Bierstadt Moraine giving brilliant views of Longs and the Front Range. As three routes converge on this lake, all of which lead to Shuttle Bus serviced trailheads, this hike can be done many different ways or even tacked onto a bigger venture. Arguably the best route is from the Bear Lake Trailhead to the shuttle parking lot as this stroll is mostly downhill. Walk down, take the bus back up.
This short hike leads to the top of a foothill near the edge of the park that gives a great view of the front range. A 3-mile hike, the trail is really close to the edge of the park which spoils some of the wilderness feeling you can get far inside the park, however the view from the top is more than worth it. The Lily Mountain Trailhead can be found a little ways south of Estes Park along Route 7.