Rim Ramble Hike: A Ranger-Led Adventure. This 1.5 mile trail meanders through a dense upland forest and sinkhole rich topography. The terrain varies from level ground to gently rolling hills. This hike takes participants into areas of the park that are not open to the public unless you are participating in the hike. The walk originates at the La Chua Trail Horse Barn. Please sign-up at the Interpretive Trailer located by the Horse Barn.