Ross Dam Trail

Ross Dam: 1.5 miles return; downhill from the highway to the dam, then about 500 feet uphill back to the trailhead.

Trail

Trail

Ross Dam Trail descends from State Route 20 through forest to Ross Lake and Ross Dam, then returns uphill to the highway. NPS lists 1.5 miles total and approximately 500 feet of gain, encountered on the return climb. Moderate difficulty, steep or slippery sections and the dam edge require care.

Quick facts

Distance Miles
1.5
Route Type
Out-and-back
Difficulty Level
Moderate
Elevation Gain Feet
500

Trail profile

Distance Miles
1.5
Route Type
Out-and-back
Difficulty Level
Moderate
Elevation Gain Feet
500
Estimated Time
Planning estimate: about 90 minutes for the full return hike, plus stops. The outbound leg descends; allow time and energy for the uphill return.
Trail Surface
Dirt and gravel forest trail with switchbacks. Happy Creek crossing (small stream, knee-deep during high water). Final approach to dam is rocky.
Trail Features
  • Ross Dam crossing
  • Ross Lake views
  • Historic dam structure
  • Forest switchbacks
  • Happy Creek crossing
  • Mountain vistas
Trail Highlights
Descend through forest, crossing Happy Creek, to views of Ross Lake and Ross Dam. Return by climbing the same trail to State Route 20.

Trailhead & access

Trailhead Location
State Route 20, Mile 134
Parking Lot Size
Small pullout lot (capacity unknown—fills quickly on weekends)
Parking Fill Time
Full by 8:00-9:00 AM on summer weekends. Mid-morning to early afternoon is worst.
Shuttle Required
No
Shuttle Details
Not required. This is a roadside trailhead on SR-20. If parking is full, retreat and return mid-afternoon or try nearby trails.

Permits & conditions

Permits Required
No
Permit Details
No permits required.
Fees
No entrance fee for North Cascades National Park. America the Beautiful annual pass ($80) covers all federal recreation sites if visiting multiple parks.
Trail Status
Open year-round, but limited services outside late May-late September. Check conditions in late May before opening.
Seasonal Closures
Potential snow and ice closure December through April. Trail typically reopens late May, but early-season conditions may be treacherous.

Facilities & rules

Restrooms At Trailhead
Yes
Water Sources
Filter at Happy Creek (mid-trail) if you run low. Otherwise, carry 2L from the start—dry trail otherwise.
Accessibility
Steep, uneven forest trail; not wheelchair accessible. The route descends to the dam and requires an approximately 500-foot uphill return.

Safety & strategy

Hazards
  • Steep drop-offs at dam edge
  • Slippery trail when wet
  • Exposure during dam crossing
  • Swift creek during high water
  • Steep descent on switchbacks
Hazard Details
The dam crossing has real exposure—steep drop-offs on both sides of the dam structure. Trail surface becomes slippery when wet, especially on the switchback descent. Happy Creek can be swift and waist-deep during June-July snowmelt. The switchback descent is steep and punishing on knees.
Cell Service
Unknown—may be spotty near creek crossing area and dense forest. Plan for no signal.
Crowd Level
Moderate to busy. This is a short, iconic pull-off on the scenic SR-20 corridor—popular with tour groups and casual hikers.
Peak Crowd Times
Summer weekends (July-August), especially 9:00 AM-4:00 PM. Late May and early September are less congested.
Best Season
Late May to late September (park operational season). Late May opening may see muddy/icy conditions; August-September is most stable.
Best Time To Visit
Late May through late September during park operational season. Start by 6:00 AM on weekends to beat crowds and avoid afternoon heat exposure on switchbacks. Early morning also means better dam safety visibility.
Tips Advice
  • Bring 2L water minimum—no reliable sources until Happy Creek mid-trail.
  • Tighten boots before descending—the switchback descent is steep and slippery, especially after rain.
  • Make noise for bears.
  • Start early to avoid crowds and heat.
  • Poles help on the knee-pounding descent.
  • The dam crossing has exposure—watch your footing.

More details

Park Area
North Cascades National Park main corridor (SR-20)
Trail Markers
Well-worn and clearly marked. Trail is easy to follow—established switchback path with blazes.
Dogs Allowed
Leashed dogs allowed
Shade Level
Mostly shaded through forest canopy on switchbacks. Exposed at dam crossing—no shade, direct sun on water reflection.
Emergency Contacts
Call 911 for emergencies. Nearest ranger services: North Cascades Visitor Center in Newhalem (check hours; operational season is late May-late September).
Map Recommended
Yes
Snow Dates
Potential snow and ice December-April. Trail is lower-elevation (~3,000 ft based on Diablo Dam climate station) so may shed snow earlier than alpine trails, but check conditions before visiting in late May opening.
Mud Season
Muddy and slippery March-May during snowmelt, especially on switchbacks.
Fall Colors Peak
Late September to early October (larch and evergreen mix at this elevation)
Bug Season
Peak mosquito season July-August. Bring insect repellent.
Insider Tips
  • The false summit is at Mile 0.75 where the switchbacks level briefly—this tricks hikers into thinking the climb is done. Push on.
  • Stand dead-center on the dam structure for the best 360-degree shot.
  • Descend slowly and use trekking poles to save your knees.
  • The trail braids near the dam—stick to the main worn path.
  • Come back mid-afternoon (after 3 PM) on weekends if parking was full earlier.
Family Friendly Notes
Steep elevation gain and dam exposure make this risky for young children. Kids under 10 will struggle with the grade. Ages 10-14 need strong fitness and constant adult supervision, especially at dam edge (real drop-offs). The descent is harder than the climb—focus on foot placement and slow pace.
Review Summary
A short forest hike from the highway down to Ross Dam and Ross Lake views, followed by an uphill return. Reserve energy for the approximately 500-foot climb back; take care on wet footing and around the dam.

Location

Frequently asked questions

Is this suitable for kids?

The outbound trail descends from the highway to the dam; the return climbs approximately 500 feet. Use care on steep, wet or slippery footing, supervise children near the dam and reserve energy for the uphill return.

How hard is the descent?

The outbound trail descends from the highway to the dam; the return climbs approximately 500 feet. Use care on steep, wet or slippery footing, supervise children near the dam and reserve energy for the uphill return.

Can I do this solo?

Yes, but use caution at the dam edge. Solo hikers should bring a personal locator beacon or satellite communicator—cell service is unreliable. Tell someone your itinerary.

What's the water situation?

Bring 2L minimum. You can filter at Happy Creek mid-trail if you need refills, but don't rely on it. Stream may be dry late summer.

How crowded is it?

Busy on summer weekends, especially mid-morning. Weekday mornings and September-May are quieter. Early morning (before 8 AM) gives you solitude.

Will I slip on the descent?

The outbound trail descends from the highway to the dam; the return climbs approximately 500 feet. Use care on steep, wet or slippery footing, supervise children near the dam and reserve energy for the uphill return.

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Sources

Editorial review: YourNPGuide Editorial Team. Information is compiled from official sources, verified traveler reviews, and editorial research; no firsthand visit is implied unless explicitly documented. Learn how YourNPGuide works.

Last updated July 2026. Report an issue.