📜 Geologic park noted for unusual formations and valuable fossil deposits, including a one-mile interpretive loop trail. Located in Oglala National Grasslands. #Why Go 🍄 See mushroom-shaped hoodoos and other dramatic rock formations 🦕 Discover ancient fossils of horses, saber-toothed cats, and more 🚶 Explore interpretive loop and longer hiking trails, including a 3-mile trail to Hudson-Meng Bison Kill site 🏡 Visit a reconstructed sod house for a glimpse into the past #Why Avoid ⚠️ Gravel roads can be treacherous when wet 💧 No potable water available on site #Tips 🌅 Best colors shortly after dawn and before dusk. ☔ Park is amazing while raining to see tiny rivers. 🚫 Fossil collection is strictly prohibited. 🚰 Bring your own water. #Cost 💰 Day Use: $3 per vehicle. Overnight: $15 per night (1 vehicle), $7.50 additional. #Hours 🕒 Open year-round. #Toilets 🚽 Vault toilets available. #Parking 🅿️ Available at campsites and for day-use. #Dogs 🐕 Dogs allowed, must be kept under control.