Rainbow Park is a remote boat ramp and primitive campground located at the head of Split Mountain Canyon on the Green River, serving as a popular put-in point for whitewater rafting trips.

Access requires a high-clearance vehicle via a challenging 28-mile dirt road from the Quarry Visitor Center that becomes impassable when wet.

The site offers four basic tent-only campsites with vault toilets and fire rings, but no water or hookups; camping is $12/night on a first-come, first-served basis.