Orange Spring is a 3rd magnitude spring with a kidney-shaped pool about 110 feet long by 90 feet wide, bordered by a low concrete wall. The spring issues from a deep, circular depression about 25 feet in diameter in the south-central part of the pool. In the past, divers have entered the vent to access the cavern below. The cavern is entirely in the Hawthorn Group and is floored with sand, silts, and clays. Water comes into the cavern from a vent to the side of the cavern. The water in the spring pool is a murky green with a hydrogen sulfide odor, with algae and aquatic vegetation on the pool bottom. Discharge is toward the northeast over a manmade, limestone waterfall. The spring run flows about 500 feet to Orange Creek.
Orange Spring is owned by a water bottling company, and access is closed to the public. It was formerly used for swimming.