Forest Glen and Nun's Run Loop

This loop is located within Patapsco Valley State Park, specifically in the Hilton, Glen Artney, Orange Grove, Avalon Area. You'll find designated parking areas within this section of the park, which provide access to the various trailheads that make up this loop.

Yes, the Nun's Run Trail, which is part of this loop, is suitable for dogs. Please ensure your dog remains on a leash as per park regulations.

Yes, Patapsco Valley State Park typically charges an entrance fee, especially during peak seasons or weekends. It's advisable to check the official Maryland DNR website for current fee schedules and any permit requirements before your visit.

The loop offers different experiences throughout the year. Autumn is particularly scenic with colorful foliage. Summer provides ample shade from the dense hardwood canopy. Be aware that the tunnel under the railroad on the Forest Glen Trail may be impassable during high water levels or flood warnings, especially after heavy rainfall.

You can expect a diverse woodland experience. The Nun's Run section features an open understory with roots, rocks, and steep sections. The Forest Glen Trail has a mix of gentle and sharply sloping sections, rocky passages, natural stone steps, and boulders. Sturdy footwear is highly recommended, and you might encounter leaf-littered paths in autumn or opportunities for 'creek hopping' after rain.

This loop is generally considered to be of moderate difficulty. While the Forest Glen Trail is moderate with varied elevation changes, the Nun's Run section is rated intermediate for hiking due to its significant descent (up to a 22% grade) and rugged terrain with roots and rocks.

The loop offers classic Patapsco Valley State Park scenery. You'll hike through dense hardwood stands of tall oaks and maples, providing shade and beautiful filtered sunlight. The Forest Glen Trail closely follows the Sawmill Branch stream bed, and the Nun's Run section features a more open understory.

Along the route, you'll encounter the iconic Swinging Bridge, Patapsco Valley State Park, and the Swinging Bridge and Patapsco Riverbank. The Forest Glen Trail also features a tunnel underneath a railroad and opportunities for 'creek hopping' along shallow pools.

Yes, this route incorporates sections of several other trails within Patapsco Valley State Park. You'll find yourself on parts of the Grist Mill Trail, Garrett's Pass, Santee Branch Trail, and the Patapsco Alt HoCo Thru Trail.

Given the varied and sometimes rocky terrain, sturdy hiking boots are essential. We also recommend bringing plenty of water, especially on warmer days, and checking weather conditions before you go. Trekking poles can be helpful for the steeper sections.

The Nun's Run section involves a significant descent with an average grade of 12% and a maximum of 22%. If you prefer to minimize the steep downhill, consider hiking the loop in a direction that allows you to ascend Nun's Run instead, though this will be a strenuous climb. Always be prepared for challenging sections regardless of direction.