The large west facing wall on the river side of the road, clearly visible before you go through the first tunnel.
Rock quality varies dramatically depending on where you are on the wall.
Pretty secluded as the approach is long by Gilman standards.
Multi-pitch sport climbing with some trad. Routes are 2 or 3 pitches long.
Definitely not full developed yet. There is room for more routes so have at it.
Getting There
Park before the first tunnel on the right or further up and walk back. Hike down the talus slope to the river and find a place to cross. Hike back up the talus slope to the base of the wall. The approach takes maybe 15 minutes plus time to find a crossing.
The Classics
Mountain Project's determination of some of the classic, most popular, highest rated routes for Spectator Wall: