Mud Lake is an easy, family-friendly hiking destination near Nederland in Boulder County, set just off the scenic Peak to Peak Highway. The short dirt road from the highway leads to a parking lot with vault toilets, and from there a five-minute walk brings you to a peaceful mountain lake ringed by aspens and pines. With loop trails under three miles total, minimal elevation change, and groomed gravel paths, Mud Lake is one of the most accessible outdoor experiences in the Colorado high country — ideal for young children, older visitors, and anyone looking for a relaxed walk with mountain views.
Two loop trails circle the lake and surrounding forest. The Mud Lake loop covers roughly one mile, while a second loop adds another mile through mixed aspen and pine groves filled with wildflowers, ferns, and mushrooms in season. Combining both loops totals under three miles and takes about 45 to 60 minutes. For a longer outing, the trail extends to the DeLonde Homestead, making it a two-hour round trip from the parking lot. Mountain biking is permitted on the trails, and horseback riders use the area as well. Benches are placed at intervals around the lake, including a quiet spot on the west shore perfect for sitting and watching the water.
A large covered picnic pavilion with a grill sits near the lake, surrounded by additional picnic tables and benches — making Mud Lake a popular spot for family picnics and gatherings. The area is dog friendly, though leashes are recommended due to frequent moose sightings. Moose are regularly spotted near the lake, often a female with her calf, and visitors should keep a safe distance. Other wildlife includes coyotes, rabbits, ducks, rare butterflies, and a variety of birds.
Swimming is not permitted at Mud Lake, and summer months can bring blue-green algae blooms along the shoreline that are dangerous for dogs. Fishing is possible but the water tends to be murky. The lake transforms across seasons — spectacular golden aspens in fall, frozen ice in winter where visitors have played hockey, and carpets of wildflowers in spring. There is no entry fee. Parking can fill up on weekends, so weekday visits offer a quieter experience. A small section of trail runs near the highway with some road noise, but most of the walk feels secluded in the forest. Nederland, a charming mountain town, is just minutes away for food and supplies.