Thompson Creek Trail, Wood Thrush Trail and South Branch Loop

Starting near Fairfax County, Virginia, this 16 km (approximately 10 miles) loop trail offers a moderate challenge with an elevation gain of around 300 meters (approximately 984 feet). The trailhead is conveniently accessible by car, with parking available at the nearby Hemlock Overlook Regional Park. For those using public transport, the closest major landmark is the Vienna/Fairfax-GMU Metro Station, from where you can take a local bus or taxi to the park.

Trail Overview

The Thompson Creek Trail, Wood Thrush Trail, and South Branch Loop combine to create a diverse hiking experience. The trail meanders through dense forests, open meadows, and along serene creek beds, offering a variety of landscapes and ecosystems. The loop is well-marked, but it's advisable to use the HiiKER app for navigation to ensure you stay on track.

Key Sections and Landmarks

• Thompson Creek Trail: Starting from the trailhead, the first section follows Thompson Creek. This part of the trail is relatively flat and easy, making it a good warm-up. You'll pass through lush forest areas with towering oaks and maples. Keep an eye out for local wildlife such as white-tailed deer and red foxes. After about 3 km (1.9 miles), the trail begins to ascend gradually.

• Wood Thrush Trail: As you transition onto the Wood Thrush Trail, the terrain becomes more varied. This section features a mix of rolling hills and steeper inclines. The elevation gain here is around 150 meters (492 feet) over 5 km (3.1 miles). The trail is named after the Wood Thrush, a bird species commonly found in this area. Listen for its distinctive, flute-like song as you hike. Midway through this section, you'll come across a scenic overlook offering panoramic views of the surrounding forest and valleys.

• South Branch Loop: The final section of the loop, the South Branch Trail, takes you along the South Branch of the Bull Run River. This part of the trail is more rugged, with rocky outcrops and occasional stream crossings. The elevation gain here is another 150 meters (492 feet) over the remaining 8 km (5 miles). The riverbanks are rich with flora, including wildflowers in the spring and vibrant foliage in the fall. Historical markers along this section highlight the area's significance during the Civil War, as it was a strategic location for both Union and Confederate forces.

Flora and Fauna

Throughout the hike, you'll encounter a variety of plant and animal life. The forested areas are home to species like the Eastern Box Turtle and the Great Horned Owl. In the meadows, you might spot butterflies such as the Monarch and Eastern Tiger Swallowtail. The creek and river sections are habitats for amphibians like the American Bullfrog and various fish species.

Preparation and Safety

Given the moderate difficulty of the trail, it's important to come prepared. Wear sturdy hiking boots with good ankle support, and bring plenty of water and snacks. The trail can be muddy after rain, so waterproof gear is recommended. Cell service can be spotty in some areas, making the HiiKER app essential for navigation. Always check the weather forecast before heading out and let someone know your hiking plans.

This loop trail offers a rewarding experience for those looking to explore the natural beauty and historical significance of Fairfax County, Virginia.