Cascade River Road

Map of Cascade River Road from Mineral Park Campground, to the NPS park boundary at milepost 18, with Eldorado parking area at milepost 20, Boston Basin parking area at milepost 22.5, Cascade Pass Trailhead parking area at the end of the road.
Map of Cascade River Road within North Cascades National Park.
 

Cascade River Road provides access to Cascade Pass Trailhead and other scenic recreational opportunities along the way. Cascade River Road leaves State Route 20 at Marblemount and extends 23.1 miles (37 km) to Cascade Pass Trailhead. The first 1/3 of the road is paved (to mile 10), then becomes a rough gravel road. After the Eldorado parking area (mile 20), the road climbs steeply to Cascade Pass Trailhead. This 3-mile section of road is very narrow with steep drop offs at the edge of the road. There are limited areas to pass opposing traffic and no areas to turnaround until the end of the road. At times, ruts and washouts are impassable without a high clearance vehicle.

The road typically opens to Cascade Pass Trailhead parking area by the end of June, except when heavy snow or storm damage prevents the opening of the road until early July. Updates are provided on the Road Conditions page.

This is a popular use area during the summer season. Be prepared for the environment; know the current status of weather in higher elevations in the North Cascades, which differs from lower valley weather and conditions. Weather can change quickly, be prepared.

Parking is limited in areas along Cascade River Road and fills quickly. Congestion and parking issues occur during the busy summer season, mid-July through early October. Consider the time of day to start your trip. Parking areas are less congested in the mornings.

Know Before You Go:

  • Vehicle limits – Vehicles towing trailers and vehicles over 22 feet in length and/or 8 feet in width are prohibited within the park boundary (milepost 18).
  • Obey posted speed limits. Steep, narrow roads require lower speeds for visitor safety.
  • Parking is limited and fills quickly. Plan your trip for less busy times and seasons.
  • Eldorado parking area provides an area for larger vehicles to park and/or turn around. Visitors can walk the road to experience the area.
  • Do not block gates or the road.
  • Park in designated parking areas only.
  • Do not park or stop on the road except in designated parking areas.
  • Protect wildlife and people. Store your food and garbage properly in parking areas, along the road, and at all times within the park. Visit the Wildlife Safety page for more information.

Cascade River Road may be closed at different locations throughout the year due to off season/winter closures, maintenance work, or emergency needs. Do not block the gate. Foot and bicycle traffic is permitted beyond the gate. Bicycles must stay on road and are not permitted on trails. Visit the Road Conditions page for up-to-date road information.

Distance to Cascade Pass Trailhead:

  • From park boundary - 5 miles
  • From Eldorado parking area - 4 miles
  • From Johnson Cabin - 2 miles

Last updated: May 4, 2026

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Contact Info

Mailing Address:

810 State Route 20
Sedro-Woolley, WA 98284

Phone:

360 854-7200

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