Short basalt boulders/cliff right on the side of the reservoir. All routes are top-rope only. Long pieces of webbing are recommended for use as anchors. Steel poles cemented on top of cliff should be used for On the Roof, Aimless Wanderer, and White Dome. 60 meter rope can be set up to two side-by-side routes.
Drive East on Swan Valley Highway (if coming from Idaho Falls) until you reach Meadow Creek Road. Turn right. Continue for 3 miles to the entrance. Turn right toward parking. Just below parking area is where the cliffs are located. A trail to the south descends to the base of the cliffs.
What makes you think its closed? I have gone night climbing there a few times with friends in the past. Actually a lot of fun. It would be fun to bolt some routes, get a Ross-park type area going for beginning leads.
Still open to climbing but there is a 3 dollar entrance fee to the reservoir. The routes are very short and a couple of them (the ones by Yellow Jacket crack) sometimes have quite a few yellow jackets hanging out in key holds but the setting is spectacular and the climbing is fun.