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

    North Cascades

    National Park Washington

There are park alerts in effect.
show Alerts »
  • State Route 20 closed at Mile Post 134, Ross Dam

    After a brief closure at Newhalem due to an avalanche and unstable conditions, SR 20 has re-opened to its normal winter closure point at MP 134, Ross Dam. The highway will remain closed from Ross Dam to MP 171 (Silver Star Creek) until spring re-opening. More »

  • Ross Dam Haul Road Closure Continues

    A short segment of the Ross Dam Haul Road between the Diablo Lake suspension bridge and the tunnel remains closed to public use due to continued recovery following a March 2010 landslide. The closure will remain in effect through 2014. More »

  • Notice of planned work for the Cascade River Road, fall 2014

    Visitors planning to access the park via the Cascade River Road after Labor Day should be advised that the Park Service is planning a fall closure of this road at Eldorado Creek (3 miles before the end of the road) in order to perform permanent repairs. More »

Road Conditions

Road Status Comments
Skagit Valley

State Route 20
(North Cascades Highway)

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


Normal winter closure is between MP 134 (Ross Dam Trailhead) and MP 171 (Silver Star Creek). On March 31, WADOT crews began the process of clearing the highway in preparation for opening (projected for early May).

Avalanche hazard usually closes the highway sometime in late November / early December and it usually re-opens sometime between April to early May. 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


Notice of work for fall, 2014: Visitors planning to access the park via the Cascade River Road after Labor Day, 2014 should be advised that the Park Service is planning a fall closure of this road at Eldorado Creek (3 miles before the end of the road) in order to perform permanent repairs at the Boston Creek crossing. This is the same creek crossing where the road has been repeatedly damaged and closed, most recently in August 2013, when over 100 visitors were stranded after a storm caused a sudden road washout.

The closure will be in effect for all vehicle traffic, but could also include foot traffic (fully or partially). During the work, many construction vehicles will be using the road to access the work site, and those accessing the road will need to exercise extreme caution.

Full details of the closure have not yet been determined, but will be released as soon as they are known. If you are planning a trip to the Cascade Pass area, please check back after May 1 for updates.

Currently: As of April 15, the road was drivable to between mile 13 - 16 (snow melting in this section), then impassable due to snow and debris.

The road is gated at mile post 20 (Eldorado Creek) for the winter season, three miles before the road's end at the Cascade Pass trailhead. During the late autumn, winter, and spring, the road is open below the gate as conditions permit (due to snow on the road).

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

Rough on the upper section. Road is not plowed or maintained in the late fall, winter, and spring.

Road is very rough and steep in places, with deep washboards on switchbacks. High clearance vehicles are recommended.

As of April 15, drivable to mile 3.5, then snow blocks the road.

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

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.

As of March 29, snow blocks the road at about 1.5 miles.

Hozomeen Road

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

Elevation at Hozomeen: 1609 feet


Gated at the U.S. border.

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.

No recent report - expect snow. Road is subject to flooding during the spring snow melt.

Stehekin Valley

Stekekin Valley Road
OPEN 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

CLOSED until late May 2014

A 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. Visit the North Cascades Lodge at Stehekin website for a current schedule.


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

Did You Know?

Cascading stream

The North Cascades are well known for the abundant waterfalls that lace the mountains. Two of the best known waterfalls are Gorge Falls between Newhalem and Diablo along State Route 20 and Rainbow Falls in the Stehekin Valley.