Sulphur Spring is a fourth-magnitude spring, formerly known as Camp Spring. A large sand boil about 5 feet wide discharges into an oval-shaped spring pool about 70 feet long and 15 feet wide. The bottom of the pool is covered with organic debris, except at the spring boil. The water is clean and clear, with a strong sulfur odor. The spring run flows east about 0.5 mile to Rock Springs Run.