Best Trails 1 Gem Lake Trail Estes Park, CO Hiking Gem Lake Trail is a 1.8 mile out and back trail located near Estes Park, Colorado that features a lake and is rated as moderate. The trail is primarily used for hiking and is accessible year-round. 2 Ouzel Falls Trail Allenspark, CO Hiking 3 Emerald Lake Estes Park, CO Hiking 4 Horsetooth Mountain Park: Horsetooth Falls and Horsetooth Rock Trail Fort Collins, CO HikingEquestrian 5 Nymph Lake, Dream Lake, and Emerald Lake Estes Park, CO HikingNature WalksFly FishingSnowshoeing Best Hiking Best Mountain Biking Best Trail Running North Fork Trail Glen Haven, CO Gravel Pit Trail 1013 Donner Pass View More Gravel Pit Trail 1013 Glen Haven, CO East Longs Peak Trail Estes Park, CO Devil's Backbone Nature Trail Cascade Falls Youngs Gulch Fort Collins: Poudre River Trail View More Recent Reviews North Fork Trail by Donna Kennedy (1798) over 3 years ago 24 Completed 25 Reviews This is a great hike if you need to get out for the day! Great for dogs because of the many water crossings. Shade and sun is great too. Be cautious in the spring/early summer; snow can still be present past the boys camp. Can be muddy past boys camp but still passable. North Fork Trail by A.L. almost 10 years ago Completed Reviews This was a very nice hike, but the turn off is just BEFORE mile marker 9, not just after, if coming from the Loveland side! This caused us much confusion, but after driving many miles out of our way we finally found it, and enjoyed it very much. There are signs for a retreat up the road to take (51B).