5.0
(2980)
10,279
runners
02:17
14.1km
830m
Running
Jogging the difficult 8.8-mile Quartz Lake trail in San Juan National Forest offers stunning alpine scenery and 2737 feet of elevation gain.
Last updated: February 26, 2026
Tips
Your route passes through protected areas
Please check local regulations for:
South San Juan Wilderness
San Juan National Forest
Waypoints
Way Types & Surfaces
Way Types
14.1 km
Surfaces
14.1 km
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Elevation
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Weather
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Today
Sunday 5 July
22°C
11°C
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Max wind speed: 11.0 km/h
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This route was planned by komoot.
The ideal time to experience this trail is typically between July and September. Snow can linger on parts of the route well into the summer, especially the potentially dangerous snowfield mentioned in trail reports. Visiting during this window ensures more favorable conditions.
While the komoot tour is categorized for jogging, this trail is considered extremely challenging for continuous running. It features significant elevation gain, steep and rocky sections, and uneven terrain above treeline. Many experienced trail runners will likely find themselves power hiking or walking substantial portions due to the difficulty and technical nature of the path.
The Quartz Lake trail is accessed via the Little Blanco Trail. You'll need to find parking at the trailhead for the Little Blanco Trail, which is the starting point for this route into the San Juan National Forest.
Generally, there are no specific permits required for day hiking or jogging on trails within the San Juan National Forest, nor are there entrance fees for accessing the forest itself. However, always check the official US Forest Service website for the San Juan National Forest before your trip for any updated regulations or specific wilderness area permits that might apply.
The terrain is highly varied and challenging. It begins with a steep ascent through aspen groves, then climbs to a narrow ridge. A significant portion is above treeline, featuring glacially scoured bedrock, large boulders, and lush tundra. Near the lake, you'll often hike over bedrock, with cairns marking the way. Be prepared for uneven surfaces and a demanding 500-foot climb on the return from the lake.
This trail is renowned for its breathtaking scenery. Early on, you'll get views of Pagosa Springs, Echo Lake, and Chimney Rock. Above treeline, enjoy panoramic 360-degree mountain views, especially from the 'Keyhole' in Quartz Ridge. The destination itself, Quartz Lake, is a deep glacial tarn with aquamarine water nestled among jagged peaks. You'll also see an amazing assortment of wildflowers in season and potentially moose.
Yes, the Quartz Lake trail is generally dog-friendly. However, as it's located within the San Juan National Forest, it's crucial to keep your dog under control, preferably on a leash, to protect wildlife and ensure a pleasant experience for all trail users. Always practice Leave No Trace principles, including packing out all pet waste.
Yes, the route primarily follows the Little Blanco Trail. The komoot tour indicates that 100% of the route is on the Little Blanco Trail, with another 7% also noted, suggesting it's the main access path for the entire journey to Quartz Lake.
Given the challenging nature and high-altitude environment, essential items include plenty of water, high-energy snacks, sun protection (hat, sunscreen, sunglasses), rain gear, extra layers of clothing (weather can change rapidly), a map and compass or GPS device, and sturdy hiking boots. Trekking poles are highly recommended for the steep and rocky sections.
Yes, several. A significant portion of the trail is above treeline, making you vulnerable to lightning during afternoon thunderstorms. It's highly recommended to start early in the day to be off the exposed sections before the typical afternoon storm activity. Also, snowfields can persist into August and may be dangerous. Always be aware of your surroundings and turn back if conditions become unsafe.
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