Horsethief reservoir is at about 5,000 feet just east of Cascade Idaho off Warm Lake road. There are 5 public campground loops around the north and northwest shores under Idaho Fish and Game jurisdiction and managed by the Boise YMCA. Most of these loops have just been renovated and re-opened as of May 2022. ALL sites are first come, first served, no reservations. I was told there are about 115 camp sites between the 5 loops. One loop is unrenovated and more primitive/informal at the furthest east loop. We stayed in Osprey cove loop #24 which is one of very few pull-throughs. Most loops are paved with gravel camp site parking. Nice level camping/picnic pads at each site and new metal picnic tables. This lake offers great fishing and kayaking. Motorized boats OK, but NO WAKE allowed so you are just trolling at idle. Many camp sites are shaded. NO water/electric/sewer or dump stations or garbage. Take everything out that you brought in.