Access to Ross Dam Trail, Happy-Panther Trail and East Bank Trail remains possible from the Ross Dam Trailhead along the North Cascades Highway (S.R. 20) at milepost 134. Access to the Diablo Lake ...

The Ross Haul Road between Ross Powerhouse and the tunnel, as well as the Diablo Lake Trail Bridge ... Boats and gear must be portaged around Ross Dam over a mile long gravel road with switchbacks ...

Summer gives the best access, though snow can block high trails into July. The North Cascades Highway, from Ross Dam to beyond Washington Pass, closes in winter. Stehekin, a year-round community ...