Rainbow Campground is located on the Oak Grove Fork of the Clackamas River not far from the Clackamas River itself. The campground is tucked down off of Highway 224 and is located across from the Ripplebrook Campground. There is plenty of privacy in the majority of the campsites and some of the sites are nestled up against the Oak Grove Fork of the Clackamas River which is more like a small creek. Swimming would not be ideal here as the creek is shallow and mostly shaded but it does provide soothing sound of running water. Overall this is a nice little campground that is great for a big city get-away.