Spur 406 Campground is a primitive 6-site campground in Amistad National Recreation Area offering affordable camping ($3-$6/night) on a walk-in basis with vault toilets, picnic tables, and fire grills.

The campground features paved roads and gravel campsites, a boat launch ramp (water level dependent), and access to scenic borderlands terrain, though it lacks hookups and running water.

Sites are first-come, first-served year-round, rarely fill except on holiday weekends, and accommodate both tents and RVs.