The Maroon-Snowmass Trail is a spectacular 16.7-mile alpine route through Colorado's Maroon Bells-Snowmass Wilderness, connecting Maroon Lake to Snowmass Lake at elevations above 10,000 feet. This trail is most commonly hiked as a 2-3 day backpacking trip, though many use it as part of the renowned Four Pass Loop. The route showcases classic Colorado high country: wildflower meadows, aspen groves, beaver ponds, rushing creeks, and dramatic Elk Mountain peaks. Expect well-maintained but rocky trails, multiple creek crossings, and several thousand feet of cumulative elevation gain despite the relatively modest point-to-point elevation change. This is best suited for experienced backpackers comfortable with high-altitude hiking, afternoon thunderstorms, and permit planning.
Advance overnight permits are required year-round through Recreation.gov for the Snowmass Lake Zone and other permit zones in the Maroon Bells-Snowmass Wilderness. Permits cost $10 per person per night (May 1-October 31), plus a $6 non-refundable reservation fee. Children 16 and under are free. You are limited to two permits per person per calendar year, with a maximum stay of seven nights per permit.
Permit availability: - June-July trips: Reserve starting February 15 - August-September trips: Reserve starting June 15
For dispersed camping in the Maroon Zone (outside designated permit zones), self-registration at the trailhead is required. All campsites must be at least 200 feet (70 paces) from trails and water.
Critical regulations: - Bear canisters are mandatory (IGBC-approved) - Campfires prohibited above 10,800 feet (including Snowmass Lake) - Group size limited to 10 people maximum - Dogs prohibited in Conundrum Hot Springs Zone; must be leashed elsewhere - WAG bags (human waste bags) are highly recommended and available free at trailheads
Official permit information: https://www.recreation.gov/permits/4675333
Optimal window: Late July through mid-September. Snow typically clears from passes by mid-July, though early July can still present snowfields on higher elevations. From early October through June, mountain passes and campsites are snow-covered and trailheads may be inaccessible.
July: The season opener. Expect lingering snow on passes early in the month, peak wildflowers mid-to-late July, and abundant water sources from snowmelt. Afternoon thunderstorms are common.
August: Prime time. Trails are fully clear, wildflowers remain excellent (especially early August), and weather is generally stable—though afternoon lightning remains a near-daily occurrence above treeline.
September: Fewer crowds and drier weather. Early September offers warm, sunny days with fall colors beginning mid-month. Nights get cold (20s-40s°F), and snow can arrive any time after mid-September. Late September is a gamble but can deliver spectacular conditions.
Wildflowers: West Maroon Pass and surrounding meadows are legendary for mid-July to August displays. Paintbrush, lupine, columbine, and alpine sunflowers dominate.
Water is abundant throughout summer. The trail crosses Snowmass Creek multiple times and passes numerous tributary streams. Late summer (August-September) may see some smaller side streams dry up, but Snowmass Creek itself is reliable through the hiking season. Beaver ponds along the route offer additional water sources (filter thoroughly).
Resupply: There are no on-trail resupply options. The nearest town is Aspen (30+ minutes from Maroon Lake trailhead), with Clark's Market in Snowmass Village offering full grocery selection but at resort pricing. For better prices, stock up in Carbondale or Glenwood Springs before arriving. No mail drops are practical for this short trail.
Creek crossings: Snowmass Creek must be crossed at several points, including near beaver ponds around mile 2.5. Early season (June-early July) crossings can be challenging and dangerous due to high snowmelt. By late July, water levels drop significantly. One crossing uses a log jam; others require rock-hopping or wading. Sandals recommended.
Afternoon thunderstorms: Lightning strikes are the primary hazard in Colorado's high country. Storms typically develop 1-3 PM. If hiking over Buckskin Pass or connecting to the Four Pass Loop, start your pass crossings by 6-7 AM to be below treeline by early afternoon. If caught above treeline during a storm, descend immediately and avoid ridgelines, lone trees, and rocky outcrops.
Altitude: The entire trail is above 10,000 feet. Maroon Lake trailhead starts at 9,580 feet; Snowmass Lake sits at 10,980 feet. Allow time to acclimatize in Aspen or nearby before starting your trip.
Wildlife: Black bears are present. Bear canisters are required—this is not optional. Habituated marmots at Snowmass Lake and Crater Lake have been known to chew through backpacks and tents. Never leave gear unattended. Mountain goats and bighorn sheep are common on ridges and passes.
Navigation: The trail is heavily trafficked and well-marked. No special navigation skills required in good weather, though carrying a physical map is wise given the remoteness.
Maroon Lake Trailhead: From Aspen, drive west on CO-82, turn left onto Maroon Creek Road. The Maroon Bells Scenic Area requires reservations May 15-October 31 and is closed to private vehicles 8 AM-5 PM during peak season. You must either:
Take the RFTA shuttle from Aspen Highlands Welcome Center (most popular). Shuttles run May-October, cost $16/adult, $10/seniors and kids. Departs every 20-30 minutes. Parking at Highlands costs $8/hour ($42-48/day max). Free RFTA bus available from downtown Aspen to Highlands.
Drive with a parking reservation ($10 fee) if arriving before 8 AM or after 5 PM, or during the reservation window. Book at visitmaroonbells.com.
From Denver International Airport: 220 miles, 3.5-4.5 hours. Roaring Fork Express and Epic Mountain Express offer shuttle services. United Airlines flies Denver-Aspen (45 minutes, 9+ daily flights on weekends). Most backpackers drive or arrange private shuttles.
Trailhead facilities: Vault toilets, bear canister loaner program, WAG bag distribution. No water spigots.
Camping strategy: The Snowmass Lake Zone is popular and often crowded—expect to see other tents. For more solitude, consider camping in the dispersed Maroon Zone on your first night (around 5-6 miles in) or the Upper Snowmass Zone beyond the lake. Prime Snowmass Lake campsites are across the creek beyond the initial lakeside sites.
Timing: If doing this as an out-and-back from Maroon Lake, plan two nights minimum (17 miles one-way is a slog in a single day at altitude). Three days allows for a layover to explore Snowmass Mountain's east slopes or Hagerman Peak.
Connecting to Four Pass Loop: Many backpackers incorporate this trail into the 26-28 mile Four Pass Loop by continuing from Snowmass Lake over Trail Rider Pass (12,420 ft) and Frigid Air Pass (12,415 ft). This adds significant difficulty but showcases four 12,000+ foot passes in one trip.
Shuttle logistics: If hiking point-to-point, you'll need to arrange a car shuttle between Maroon Lake and the Snowmass Creek/Snowmass Falls trailhead. No commercial shuttle services operate this route; you'll need two vehicles or a cooperative friend.
Weather windows: Check mountain forecasts before departing and be willing to take storm days. Above treeline exposure on passes means lightning risk is not negotiable. When storms roll in (and they will), retreat to treeline.
Crowds: Weekends in July-August see heavy traffic. Weekdays and September offer quieter experiences. Starting early (6-7 AM shuttle) helps you claim better campsites at Snowmass Lake.
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