Rattlesnake station is the original settlement of Mountain Home, ID. It's at the base of volcanic rock covered mountains. The majority of the rock in the area is Rhyolitic with some basalt. It's pretty solid rock, but tends to crumble a little here and there because of rock cleavage. The milky looking calcium deposits make some of the crags look like a milk fountain coming out of the rock.
Most of the climbing is on the east side of the hill with all the antennas on it. There are cliff faces on both the east and west sides that are climb-worthy. So you can climb the west side in the morning and the east in the afternoon. There is also plenty of bouldering to do in the area.
There aren't many local climbers, so it's never crowded. Plus this is a new area, so there is plenty of potential for development.
Take exit 95 off I-84 then head away (east) from Mountain Home up Hwy 20 about 7.2 miles (7 minutes) out to the Rattlesnake station historical marker turn-off. This is the best place to park. Walk about 1/4 mile up the road to the first cliff face (Tiger Wall).
The west side cliff face (Whistle Pig Leap) is only accessible via the service road going up to the antennas which may or may not be locked.
Avoid parking on the side of the road. Hot exhaust pipes will start brush fires very easily.
Rock quality is OK. It is pretty solid, but it flakes off here and there. The routes are really fresh, so I've had a hold or two bust off. Love the climbing though for a local crag. There's another, much higher cliff formation on the west side of the mount, but I imagine you'd have to drive up to the radio tower and walk down to the actual face. You can see it really easily while driving toward Rattlesnake station. Really would like to see how climbable it is.