• View from Sourdough Mountain Overlook  A view looking down onto Diablo Lake. Photo Credit: NPS/Michael Silverman, 2010.

    North Cascades

    National Park Washington

Road Conditions

Road Status Comments
Skagit Valley

State Route 20
(North Cascades Highway)

Elevation at high point, Washington Pass: 5,477 feet


WSDOT has gated State Route 20 (North Cascades Highway) between MP 134 and MP 171 for the season. Motorized vehicle access ends at the Ross Dam Trailhead from the west.

Avalanche hazard usually closes 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, including re-opening information, conditions and the history of pass closure dates, visit Washington State Department of Transportation.

Cascade River Road

Mile 106 off SR 20, in Marblemount

Elevation at road's end: 3660 feet

PARTIAL - open to mile 21

Road is gated at Johnson Cabin (mile 21), two miles before road's end at the Cascade Pass trailhead. During the late autumn, winter, and spring, the road is open below the gate as snow conditions permit. The county may only plow as far as mile 7, depending on conditions.

This road is vulnerable to washouts during periods of heavy rain, so be prepared, and move to safer ground if need be.

Road is paved to approx. 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, road is narrow.

Thornton Lake Road

Mile 117 off SR 20, west of Newhalem

Elevation at road's end: 2600 feet

OPEN as conditions permit

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 late fall, winter, and spring.

Sibley Creek/Hidden Lake Road
(USFS #1540)

Mile 9.7 off Cascade River Road

Elevation at road's end: 3700 feet

OPEN as conditions permit

This ~5 mile long Forest Service Road 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.

Not plowed or maintained during fall, winter, and spring. Watch for snow or ice.

Hozomeen Road

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

Elevation at Hozomeen: 1609 feet

Gated at the US border

Road on Canadian side may have snow during winter months. 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 spare.

Road is subject to flooding during the spring snow melt.

Stehekin Valley

Stekekin Valley Road
as conditions permit
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

Not available
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 in summer). 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

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