Lewis Clark Memorial Highway

The highway has a bit of a grade, and cliff side views, at the west end where it crosses Cape Horn. And just east of that is Beacon Rock, with a stair climb. There's also camping at that state park, but access and sites are best suited to cars and small RVs.

There are a couple of paved highways into the National Forest S and E of Mt St Helens. That area has waterfalls and lava fields.

Further east at Maryhill, tent campers have to be ware of the sprinkler times.