The Keyhole via Longs Peak Trail
This is a moderate out and back trail to Longs Peak via The Keyhole in Rocky Mountain National Park.
The hike is very mellow up to the Boulderfield at which point the trail becomes less clear as you begin the final sections to the peak. After the Boulderfield there is a short scramble up to the Keyhole which puts you into the Ledges. Pay attention to the bullseye marking the route from here to the peak. The ledges lead you to the Trough which has a great deal of loose rock, a climbing helmet is a good idea, which can get kicked free and fall. Should this happen call out "ROCK" for those below you. The trough ends with a small that puts you on the Narrows. This section is wider than pictures indicate but has a decent amount of exposure so mind your feet and head (overhanging rock) along the route. The last section is the Homestretch which is a class 3 scramble on fairly solid rock and puts you right on the summit.
Trailhead parking lot is shared by hikers, climbers, and backpackers which leads to the parking lot filling very quickly even during the week. Plan to park along the road if arriving after 4 am and be mindful of no parking signs as it is very common to see ticketed cars along this road.
There are numerous restrooms, ranger station, and maps at this trailhead as well as plenty of signs indicating where the trail begins. That trail is very well marked and groomed all the way up to the Boulderfield.
Some caution if bringing children. Some of the ledges are high at the Keyhole and Trough and more difficult for younger children.
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