Road Conditions

Skagit Valley

State Route 20

(North Cascades Highway)

CLOSED at Ross Dam

Current: Road is gated and closed to vehicle traffic between milepost 134 (Ross Dam) and 171 (Silver Star Creek). Road is open to non-vehicular traffic as conditions allow. Be aware of avalanche hazards.

General: Snow and avalanche hazard usually close the highway sometime in late November / early December and it usually re-opens sometime between April to early May. Normal winter closure is between MP 134 (Ross Dam Trailhead) and MP 171 (Silver Star Creek). for updates and pass history, visit Washington State Department of Transportation. Elevation at high point, Washington Pass: 5,477 feet

Cascade River Road

CLOSED at Mile 20

Current: Gated and closed to all vehicle traffic at mile 20 (Eldorado parking area), 3 miles before the end of the road. Non-vehicular traffic permitted beyond gate. Road does not receive routine winter maintenance beyond approximately mile 7 (Near National Forest Boundary). Snow or downed trees could make driving difficult or impossible. November 2017 storms spilled debris over the road and undercut the roadway in places. Watch for avalanche and other hazards.

General: Road is paved to approximately. mile 10, then gravel with some potholes and washboards, but generally drivable for low clearance vehicles. Not suitable for large RVs due to steep and narrow sections and some sharp switchbacks. Please drive slowly as the road is narrow.

Mile 106 off SR 20, in Marblemount. Elevation at road's end: 3660 feet.

Thornton Lake Road

OPEN as conditions permit

Current: Road does not receive routine winter maintenance. Snow or downed trees could make driving difficult or impossible.

General: Road is very rough and steep in places, with deep washboards on switchbacks. High clearance vehicles are recommended. Road is not plowed or maintained in the winter season.

Mile 117 off SR 20, west of Newhalem. Elevation at road's end: 2600 feet.

Sibley Creek /

Hidden Lake Road

OPEN as conditions permit

Current: Not accessible due to snow cover on Cascade River Road. Road does not receive routine winter maintenance. Snow or downed trees could make driving difficult or impossible. .

General: This ~5 mile long Forest Service Road (USFS #1540) can be rutted and rough, drive slowly. Narrow with switchbacks and very few pull-offs. Parking lot is small and turn-around can be difficult. High clearance vehicles recommended.

Hozomeen Road

U.S. Border

Current: Gated at US border.

General: The road gate at the U.S. border on is usually closed on October 31 for the winter season. This road also provides access to Silver Lake and Skagit Valley Provincial Parks in British Columbia. Road can be rough and rocky, flat tires are not uncommon, carry a full sized spare. In spring, low lying sections of this road are vulnerable to flooding during peak snow melt.

Silver-Skagit Road from Hope, BC to Hozomeen, north end of Ross Lake

Elevation at Hozomeen: 1609 feet

Stehekin Valley
Stehekin Valley Road


The road extends 13 miles from Stehekin Landing to two miles above High Bridge, just before Car Wash Falls. Not maintained in winter above mile 9, at Stehekin Valley Ranch.

Hikers and stock can access areas above Car Wash Falls via the Old Wagon Trail (Pacific Crest Trail) and Upper Stehekin Valley Trail. Bikes are not allowed above Car Wash Falls.
Stehekin Shuttle


Service for the 2017 season ended on October 15. Visit the North Cascades Lodge at Stehekin website for a current schedule. This privately run shuttle service operates between the Stehekin Landing and High Bridge, normally from late May to mid October (4 round trips daily from mid-June to early October). If you are planning to walk, bike, or ride this route, it is 11 miles from Stehekin Landing to High Bridge.


Many trails and climbing routes in the park complex are accessed via U.S. Forest Service roads. To learn about current conditions on these roads, please follow the links below.

Mt. Baker-Snoqualmie National Forest Conditions Report, including:

  • Baker Lake Road USFS #11 (access to Mt. Shuksan and Baker River Trail),
  • Shannon Creek Road USFS #1152/14 (access to Mt. Shuksan),
  • Hannegan Pass Road USFS #32 and others

Okanogan National Forest Conditions Report, including:

  • Hart's Pass Road USFS #5400,
  • Twisp River Road USFS #44 and others

Last updated: March 8, 2018

Contact the Park

Mailing Address:

810 State Route 20
Sedro-Woolley, WA 98284


(360) 854-7200

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