Overview
The Long Lake Loop is the most accessible trail at Brainard Lake Recreation Area and one of the most accessible genuine alpine experiences in Colorado. The 2.6-mile loop circles Long Lake at 10,500 feet, gaining only about 200 feet over its full distance. The terrain is a combination of packed dirt trail, gravel path, and wooden boardwalk sections, all well-maintained and clearly signed.
The lake sits in an open subalpine basin with views of the surrounding Indian Peaks summits on three sides. Shoshoni Peak dominates the south, Navajo Peak is visible to the southwest, and on clear days you can see the high snowfields on the peaks above the Continental Divide. In late July, the meadows on the north and east sides of the lake hold one of the best accessible wildflower displays in the Front Range.
This trail is the starting point for hikers continuing to Pawnee Pass or the Indian Peaks backcountry. Many hikers do the loop as a standalone outing, then watch others shoulder packs and head up the valley toward the higher terrain. The loop itself is entirely within the Brainard Lake Recreation Area and does not require an Indian Peaks Wilderness permit.
The Route
East trailhead start, counterclockwise. The recommended direction is counterclockwise (heading south from the trailhead parking area along the east shore, crossing the outlet stream, looping around the south and west side, and returning along the north meadow boardwalk). This puts the most scenic section - the open north meadow with the best peak views - at the end of the loop when light tends to be better in the afternoon. Either direction works.
East shore: The trail from Long Lake Trailhead heads south along the eastern shore through open subalpine forest mixed with meadow clearings. Views across the lake open immediately. The grade is nearly flat. At the south end of the lake, a footbridge crosses the outlet of the creek draining from Lake Isabelle above.
South and west sides: The trail continues along the south shore and bends around to the west end of the lake, where the inlet creek flows in from the upper basin. This is the quieter side of the loop - fewer people stop here than at the meadow sections. The west end of the lake offers good views back east along the lake's length.
North meadow: The return along the north shore crosses the most open meadow section, with boardwalk protecting the wetland and wildflower areas closest to the water. In peak bloom (typically mid-to-late July), this stretch is carpeted with columbine, paintbrush, aster, and bistort. The Indian Peaks summits frame the view to the south across the lake. This is the most photographed section of the loop.
Return to trailhead: The trail returns to the Long Lake Trailhead parking area, completing the loop.
Permits and Fees
The $15 per vehicle Brainard Lake Recreation Area day-use fee (as of 2026) is required at Long Lake Trailhead. An America the Beautiful pass does not waive this specific recreation area fee. No wilderness permit is required for the loop.
Verify current fee and access requirements through the Boulder Ranger District or recreation.gov before your visit. The Brainard Lake area has a complex parking and fee management system that has changed periodically, and current-year procedures may differ from prior seasons.
When to Hike
June through October is the broader season listed for this trail, with the lower loop sections accessible earlier in the season than the higher trails from the same area. In a typical year, the loop is passable by mid-to-late June, though the meadow sections can be muddy and the boardwalk edges icy in early season.
Late July is the wildflower peak. This is also the busiest period. On summer weekends in July and August, the Brainard Lake area is at maximum capacity, with lots filling by 8 or 9 AM and rangers managing overflow parking and shuttles.
September is excellent for this trail. Crowds drop substantially after Labor Day, morning temperatures are crisp, and the fall color in the willows and bog vegetation around the north meadow adds a warm palette to the lake views.
October can work on calm days. Snow is possible, and the Brainard Lake Road may close depending on early-season weather. Check road status before driving up.
Altitude Note
Long Lake sits at 10,500 feet. Even a gentle loop at this altitude can feel more demanding than expected for visitors arriving from low-elevation cities. Shortness of breath, fatigue, and mild headache are possible at this elevation. The CDC and wilderness medicine organizations suggest spending time at intermediate elevations before going to 10,000 feet or above. Consult a physician before planning a high-altitude trip if you have cardiovascular or respiratory concerns.
Practical Tips
Parking: Arrive before 7 AM on summer weekends. The Long Lake Trailhead paved lot is shared with hikers heading up the Pawnee Pass Trail. It fills before 9 AM on peak summer days. The forest service has operated mandatory shuttles from lower overflow areas on peak days - check current procedures with the Boulder Ranger District.
Dogs: Dogs are allowed on leash throughout the loop. Pick up after your dog; biodegradable waste bags are required in Leave No Trace practice.
Wildlife: Elk are common in the Brainard Lake basin, particularly in early morning and evening. Give them space. The meadows also support a population of marmots and pikas, often visible on rocky outcrops along the south shore.
Cell service: None at the trailhead or on the loop. Download an offline map before arriving.
For hikers wanting more distance from the same trailhead, the Pawnee Pass Trail shares the initial section of the Long Lake Loop before heading up the valley toward the Continental Divide. The Mount Audubon Trail is accessible from the adjacent Mitchell Lake Trailhead, a short drive further along Brainard Lake Road.
Practice Leave No Trace on this heavily visited trail. Stay on the boardwalk and established trail in the meadow sections to protect the fragile alpine vegetation.