Aspen Ridge-Boulder Ridge - 6.2mi Moderate Loop

A rocky, mountain canyon sits across a calm lake.

This moderate loop through Laurance S. Rockefeller Preserve tests grit with relentless elevation gain and a boulder field demanding scrambling skill. You'll traverse aspen groves and navigate technical rock work before earning the payoff—Phelps Lake's shore with Death Canyon views. Expect to push 1,140 feet uphill over 6.2 miles with zero mercy from exposure. Not a stroll; this is where hikers discover what they're made of.

Quick facts

Distance Miles: 6.2
Route Type: Loop
Difficulty Level: Moderate—Technical boulder sections and 1,140ft gain demand fitness and scrambling comfort.
Elevation Gain Feet: 1140

Trail profile

Distance Miles: 6.2
Route Type: Loop
Difficulty Level: Moderate—Technical boulder sections and 1,140ft gain demand fitness and scrambling comfort.
Elevation Gain Feet: 1140
Estimated Time: 3–5 hours (fit hikers on the faster end; longer stops for photos/recovery push toward 5).
Trail Surface: Dirt and grass in aspen sections, loose rock and boulders in the field (hopping required), rooty and uneven patches in shaded areas.
Trail Features: Aspen groves
Boulder field scrambling
Phelps Lake
Death Canyon views
Mixed conifer and aspen forest
Trail Highlights: Loop hike to scenic Phelps Lake with Death Canyon vistas. Boulder scrambling adds technical challenge and aerobic demand. Moderate elevation gain with mixed shade through forest and open rock.

Trailhead & access

Trailhead Location: Laurance S. Rockefeller Preserve (accessed via Moose-Wilson Road from Moose Junction).
Parking Lot Size: Limited to 50 cars.
Parking Fill Time: Typically full by sunrise in mid-summer; arrive by 6:00 AM to guarantee a spot.
Shuttle Required: 0
Shuttle Details: No shuttle service available.

Permits & conditions

Permit Details: No permits required.
Fees: $35 per private vehicle for 7-day park entrance pass.
Trail Status: Open (road closures possible on Moose-Wilson Road; check NPS site before visit).
Seasonal Closures: Moose-Wilson Road periodically closes for maintenance. Road is closed to RVs and trailers year-round. Winter snow typically closes the trail from November through April.

Facilities & rules

Restrooms At Trailhead: 0
Water Sources: Phelps Lake is drinkable if filtered. No water sources mid-trail; carry all water needed for the hike.
Accessibility: Rooty in aspen sections, very technical in boulder field with hopping and climbing required. High elevation gain (1,140 ft). A seating bench exists at Phelps Lake for rest.

Safety & strategy

Hazards: Boulder scrambling
Exposure on loose rock
Elevation gain demand
Sun exposure in open sections
Afternoon weather changes
Slippery rock when wet
Hazard Details: Boulder field requires hopping and climbing up/down rocks; loose footing is common. Sun exposure is intense in boulder sections—dehydration risk. Afternoon thunderstorms possible in summer; descend early if weather builds.
Cell Service: Unreliable—some spots may have limited coverage; do not rely on cell service for emergencies.
Crowd Level: Moderate to busy mid-summer, especially mid-day. Quieter in shoulder seasons (May, September–October).
Peak Crowd Times: July–August, 10 AM–3 PM.
Best Season: Spring (May–June), Summer (July–August), Fall (September–October).
Best Time To Visit: Early season (May–June) for clear conditions before summer crowds. July–August are doable but expect busy parking by 7 AM. September–October offer cooler temps and fall colors. Start by 6 AM regardless to avoid the lot filling up mid-morning.
Tips Advice: Carry 2+ liters of water—the boulder field has zero shade.
Tighten boot laces before entering the rock section—loose boots cause ankle rolls.
Make noise if you see wildlife (bears, moose).
The trail crosses creeks; wear waterproof boots or expect wet feet.
Leave by 2 PM to descend in daylight.
Trekking poles reduce joint impact on the descent.

More details

Park Area: Laurance S. Rockefeller Preserve
Trail Markers: Well-marked main trail with cairns in boulder sections.
Dogs Allowed: No—park regulations prohibit dogs on most trails.
Biking Allowed: No—hiking only.
Shade Level: Mixed—Aspen groves provide partial shade early; boulder field is full sun. Wear a hat and sunscreen.
Emergency Contacts: Park ranger at Laurance S. Rockefeller Preserve visitor area or Grand Teton National Park rangers at visitor centers. Dial 911 if in range.
Map Recommended: 1
Snow Dates: Trail typically snow-free June through October. Lingering snow at higher elevations possible through May.
Mud Season: April–May: snowmelt creates muddy sections on lower portions.
Fall Colors Peak: Late September through mid-October (aspens turn golden).
Bug Season: July–August: mosquitoes active, especially near Phelps Lake and moist sections.
Insider Tips: Phelps Lake's reflection shot is best at dawn (6–7 AM) when light is soft and fewer hikers present.
The boulder field is the crux—don't rush it; set a conservative pace through the scramble.
Stream crossings manageable mid-summer but swollen in early June; expect wet boots in spring.
Going in September? Start early before fall foliage draws crowds.
Family Friendly Notes: Suitable for kids 12+ with hiking experience. Boulder scrambling requires surefootedness and confidence on uneven terrain. Younger children may struggle with technical sections and elevation gain. Keep children close in exposed boulder areas.
Nearby Facilities: Laurance S. Rockefeller Preserve has a small visitor area. Nearest supplies: Moose (5+ miles away). No lodging at trailhead.
Review Summary: Hikers praise the technical challenge and lake views, but consistently report the elevation gain and boulder scrambling demand respect. Most complete the loop in 3.5–4.5 hours and rate it as a solid moderate workout with real consequences for fitness miscalculation.

Frequently asked questions

Is this trail too hard for me?

It depends. If you've hiked 5+ miles with 1,000+ feet of gain before, you can do this. The boulder scrambling is the crux—if that intimidates you, pass. The elevation gain is relentless but manageable for most fit hikers.

Can I hike this alone safely?

Yes, but tell someone your plan and expected return time. Cell service is unreliable. The trail is well-marked and moderately busy—you'll see other hikers. Avoid solo trips in bad weather or at dusk.

Do I need special gear or poles?

Trekking poles reduce knee strain on the descent and help with boulder scrambling. Waterproof boots are smart (creek crossings exist). A map is wise backup. No ropes or climbing gear needed.

How much water should I carry?

Minimum 2 liters. The boulder field is sun-exposed with zero shade. In summer heat, 3 liters is safer. Phelps Lake water is drinkable if filtered, but rely on carried water for the hike out.

What if I get to the parking lot and it's full?

The lot fills by 7–8 AM mid-summer. Arrive by 6 AM. If it's full, wait 1–2 hours or hit Hermitage Point Loop (same preserve, quieter). Check NPS.gov for real-time lot status if available.

Are there bears on this trail?

Yes. Black bears use this area, especially berry season (late summer). Make noise—talk or use a bear bell. Never run if you see one; back away slowly. Carry bear spray if comfortable using it.