Castle Rocks State Park ADDRESS & CONTACT Address 3035 S US Hwy 77 Spur, Almo, ID 83312 GPS 42.125436221576, -113.66832935581 Plan My Route Evidence suggests that folks have been coming to Castle Rocks for nearly 9,000 years. Campsites are nestled among Idaho’s largest pinyon pine forest on the east slope of the 7,500-foot Smoky Mountain. LOCATION ON MAP Plan My Route Home » Things To Do » Campgrounds » Castle Rocks State Park NEW SEARCH