Read the written gage description below on 'Flow' tab.
The old-school take-out behind the post office along Rt. 39 in Rockbridge Baths will allow you to run the entire section. Parking is on the side of the road (northbound) across from the post office.
Most folks choose a shorter option. Proceeding upriver, the other take-out options are as follows: The Ledges, The Springs, Indian Pool, and Laurel Run Picnic Area. Bite off as much as you want; or do laps on the meat of the run.