Marathon is at approximately the half way point down the Keys and is one of the more popular vacation spots. There are three good running spots in this area:
- Overseas Heritage Trail. Just north, from Curry Hammock State Park to Tom’s Harbor Cut (MM 54-62) and just south, from Knights Bridge (MM 47) to Duck Key.
- In Marathon. Coco Plum Drive is pleasant for running, with a bike path paralleling the road for most of the road from Rt. 1 to the end, 2 miles one-way. There are NOT water views for most of this route. Just south of that is the Sadowski Causeway to Key Colony Beach, which is a pleasant 1.1 mile run to end of E. Ocean Dr. and then 1 mile to end of W Ocean Dr./Sandy Point, or a total of 3.5 miles incorporating both sections. There are some nice water views here, and a decent shoulder for running.
- South of Marathon. Sombrero Beach Rd. (Rt. 931). About 2 miles along a flat, lit bike path separated from the road. For a longer run, combine with Sombrero Beach Blvd. for a 6.7 mile loop.