The rock is a homogeneous, dark red-brown to mostly purple quartzite, which fractures very cleanly to leave angular features and smooth, almost shiny surfaces. Climb ratings run the gamut, from 5.1 to 5.13a. Devil's Lake cliffs are 30 to 90 feet high, forming a large bowl around Devil's Lake.
Most moderate routes follow one of the many vertical cracks.
By very actively maintained local tradition, there is only one bolted route in the entire park, so bring a rack or plan to top rope everything. The placement of any further bolts is utterly out of the question, and would probably get climbers booted entirely from the park. Camping is available in the park year-round, though very crowded during the summer. Several local campgrounds aren't much better. Wheeler's Campground, just north of the park, does its best to accommodate climbers well.