Potomac Heritage Trail and C&O Canal Towpath - Key Chain Loop

MODERATE 5 reviews

Potomac Heritage Trail and C&O Canal Towpath - Key Chain Loop is a 9.7 mile moderately trafficked loop trail located near Washington, DC that features a river and is rated as moderate. The trail offers a number of activity options and is accessible year-round. Dogs are also able to use this trail.

9.7 miles 702 feet Loop

dog friendly



nature trips

trail running




wild flowers

C&O Canal, Key and Chain bridges, Potomac Heritage Trail, Potomac River views Some begin the loop by hiking North from the parking lot and crossing the Key Bridge. I like to head south first, following the ramp up and across the Roosevelt Bridge. Walk behind the Kenedy Center, and past Watergate to Thompson's Boat House. Here's where you'll find Mile 0 for the C&O Canal. Continue from there up and across the Rock Creek bridge to the C&O Canal trail in Georgetown. Follow the trail for 4.2 miles to the Chain Bridge. Cross the Chain bridge, and nest small bridge. Potomac Heritage Trail is immediately on your right. You'll turn and go under the bridge heading south. Follow the blue blazes carefully. During times of flooding the parts of the trail may be under water. It's not too difficult to remain up the bank a bit and meander along until the trail rises back up to meet you. Follow along back to the Theodore Roosevelt parking lot.

4 days ago

2 months ago

Starts off nice from Roosevelt Island. Getting closer to Chain Bridge, the trail markings disappear and it gets very rocky. Stick near the water line and you'll make it to Chain Bridge. The way back down the C&O canal tow path is flat and easy but very little shade. Nice little boat house with snacks and drinks about half way down towards Georgetown. Definitely will do this again but not on the hottest day of the year.

7 months ago

This was our first visit to the Turkey Run portion of the Potomac Heritage trail area. While not a longer trek, seeing the area in the late winter time frame was well worth the time. The high water levels--and the obviously powerful current therein, was impressive. So to was the abundance of quartzite formations littering the place. The trails are rugged, well marked and diverse. The proximity to the ranger station and bathrooms (closed due to the season) are pluses. The little picnic area by the parking lot could use some gussying up, but that's just a style point. All in all, my son and I loved it. We'll do it again!

1 year ago

On May 14, 2015, my son and I hiked on this great 10-mile Metro-accessible trail. Starting from Rosslyn, we hiked west along the Potomac Heritage National Scenic Trail between the George Washington Memorial Parkway and the Potomac River. This is a very rugged but well marked trail that offers great views of both the River and numerous waterfalls created by the many small streams. Lots of wildlife too! We then crossed the Chain Bridge, hiked east along the C&O Canal Towpath, and stopped for lunch at Fletcher's Boat House. We finished our journey by crossing the Key Bridge back to where we started in Rosslyn less than six hours ago. A fantastic day!

5 years ago

We started the trail going south from the parking lot, hiking the C&O tow path toward Virginia, once we crossed the potomac into Virginia there was no sign of a trail, and we couldn't find the blue blazes anywhere. We started working along the water line for about a mile or so until we have reached a dead end and had to turn around and walk back.

The trail is nice, but it's not marked at all on the Virginia side.