
Place
Challenging

This is a big, rewarding west-side push: 17.1 miles total (out-and-back) with about 2,919 feet of gain to pristine alpine lakes tucked below Nakai Peak. Start at the Green Mountain Trailhead and work your way through classic RMNP terrain—broad wetlands, a lively creek corridor, a photogenic waterfall—before a stout spur delivers you into a quiet, boulder-rimmed lake basin above treeline.
From the Green Mountain Trailhead, climb to Big Meadows, a two-mile-long wet meadow/fen that’s prime bird habitat and excellent for spotting moose along the edges. Continue along the Tonahutu Creek corridor toward Granite Falls, where water sluices over polished granite slabs—a worthy break spot before the final push.
Turn onto the Haynach Lakes spur. The first quarter mile is brutally steep, then the grade eases into cool subalpine forest and a sequence of pond-dotted meadows with sweeping views. In open stretches the path can feel faint; stay attentive. The trail undulates to the main Haynach basin, where boulder fields harbor chirping pikas and clear water often reveals cruising trout. The lakes sit above treeline beneath Nakai Peak.
Expect a mosaic of burned and unburned forest from the 2020 East Troublesome Fire near the approach—jarring at times, but it opens long views and fuels colorful wildflower regeneration. Meadows can be wet and “squishy” in mid-summer. Users report occasional downed trees on the Haynach spur; it’s been described as no longer maintained but generally passable.
Summer through early fall is prime. Snow can linger on the Haynach section into summer and may require traction (microspikes or snowshoes) early season depending on conditions. High-country weather flips quickly—thunderstorms are common—so plan to be back below treeline before early afternoon. Mid-August is lush and floral; by late September, the landscape shifts to golden tones with clearer sightlines.
This is an excellent overnight if you prefer to split the mileage. Permits are required for all backcountry camping, and day-of permits may be available in person year-round. The designated Haynach Lakes campsite sits in forest on the edge of a meadow at roughly 10,760 feet, about 0.5 miles upstream from the Tonahutu Trail and 0.8 miles below Haynach Lake. Campfires are prohibited here—bring a stove. Bear-resistant canisters are required April 1–October 31. Treat or boil all water from creeks or lakes. Dogs are not permitted on park trails.
Moose, elk, and mule deer frequent the meadows and creek corridor; listen for pikas among the lakeside boulders.
Park at Green Mountain Trailhead on Highway 34, about 3.1 miles north of the Kawuneeche Visitor Center.
Long, high-elevation day with exposure above treeline. Snow can linger into summer; traction may be needed early season. Afternoon thunderstorms are common—plan to be below treeline early. Expect wet, muddy meadows, faint tread in open areas, and occasional blowdowns on the Haynach spur. Bear canisters required April–October; no campfires at the Haynach site. No dogs on trails.
