It starts and stops at the Washington Monument.
The route relies heavily on bike and running trails and only about 5% of it is on busy streets.
1. Anacostia Park
2. Suitland Parkway
3. Oxon Run Trail
4. Oxon Hill Bike Trail
5. National Harbor/Woodrow Wilson
6. Mount Vernon Trail
This marathon loop crosses three bridges:
1. Frederick Douglas (Nationals Park to Anacostia)
2. Woodrow Wilson (National Harbor to Alexandria)
3. Memorial (Arlington to National Mall)
It finishes with one loop around Hains Point to finish at the Washington Monument to reach exactly 26.2 miles.
The majority of the course is very scenic especially along Oxon Hill Trail (wild deer and turkeys)
The only major traffic lights you will encounter are those along Independence Ave and on Suitland Parkway and Stanton Rd in SE.
The idea is to one this loop for a marathon distance or to cycle this loop four times to reach 105 miles.