Four Mile Run and W&OD Trail Loop

Parking is available at various points along both the Four Mile Run Trail and the W&OD Trail. Given the popularity of these trails, especially on weekends, arriving earlier in the day is recommended to secure a spot. You can often find parking near parks that connect to the trails, such as Glencarlyn Park.

Yes, the loop is generally suitable for beginners. The W&OD Trail portion is mostly flat and paved, making it quite easy. The Four Mile Run Trail introduces some short, steep sections and more twists, adding a slightly moderate element. Overall, it's a great option for those new to hiking, but be aware of heavy foot and bike traffic, especially on weekends.

The terrain is predominantly paved throughout the loop. The W&OD Trail follows a former railroad bed, so it's very flat and smooth. The Four Mile Run Trail, while also paved, features more twists and turns and some short, steep inclines. Both trails are shared-use paths.

You'll experience a mix of urban and natural scenery. The W&OD Trail offers varied views, transitioning from suburban areas to parks, with historical markers. The Four Mile Run Trail provides a scenic route along the stream, passing through wooded areas and connecting various urban parks. You might spot local wildlife, especially along the stream.

Yes, this loop is part of a larger network and connects to several other trails. You'll primarily be on the Washington & Old Dominion Trail and the Four Mile Run Trail. The route also passes through sections of the Learning Loop, Glencarlyn Learner's Loop, George Mason Drive South Spur, George Mason Drive Sidewalk, George Mason Drive North Spur, Shirlington Connector Trail, and Lucky Run Trail, offering many options for extending or modifying your hike.

Yes, the loop is dog-friendly. Dogs are generally allowed on both the Four Mile Run Trail and the W&OD Trail, but they must be kept on a leash at all times. Please remember to clean up after your pet to keep the trails enjoyable for everyone.

Spring and fall are generally the best times to hike this loop, offering pleasant temperatures and beautiful foliage. Summer can be hot and humid, while winter can be cold, though the paved trails are usually accessible. Be aware that sections of the Four Mile Run Trail can be prone to flooding after heavy rains, so check conditions before you go, especially in spring or after storms.

No, there are no permits or entrance fees required to access or hike the Four Mile Run Trail or the W&OD Trail. Both are public access trails.

Glencarlyn Park, which is along this route, is a public park and does not typically require entrance fees or permits for general use. Standard park regulations apply, such as keeping dogs on leash and respecting park hours. Always check local Arlington County Parks and Recreation guidelines for any specific rules or temporary closures.

This loop is approximately 7.8 kilometers (4.8 miles) long. Based on an average hiking pace, it typically takes around 2 hours to complete. This duration can vary depending on your speed, how often you stop, and the amount of foot and bike traffic you encounter.

While the loop doesn't feature dramatic mountain vistas, you'll find scenic views along the Four Mile Run stream and through various parks. The W&OD Trail also has historical markers detailing its past as a railroad line, offering interesting points of reflection. The urban oasis setting itself is a notable feature, providing green space within a populated area.