Blue Spring is a third-magnitude spring situated on the southeast shore of Lake Harris, in a residential area with live oak, palm, and cypress trees. The spring pool has a sand bottom with spring flow from at least nine sandy boils. The pool is enclosed by a concrete retaining wall that forms a reverse L-shaped swimming pool. The pool discharges through a weir in the retaining wall on the northeast side of the pool and then into a run about 30 feet wide, flowing southeast in a parallel direction to the lakeshore. The spring run flows about 100 feet to the south side of Lake Harris, with additional boils observed in the spring run. The site is privately owned and not open to the public. It is used as a swimming and recreational facility for local residents.