Old Main Line and Backside of Daniels Loop

While the Old Main Line section is relatively flat and easy, following a disused railroad bed along the Patapsco River, the full loop can involve varied elevation and more challenging sections. Expect some steep hills, especially if you venture off the main riverside path to explore views and ruins.

You'll experience a mix of terrain. The Old Main Line follows a flat, historical railroad bed. However, other parts of the loop involve climbing up and over relatively steep hills. The path winds through lush wooded floodplain forests along the river and upland deciduous forests on hillsides, with rock outcroppings and a burbling creek adding to the natural landscape.

Yes, the trails in Patapsco Valley State Park, including this loop, are generally dog-friendly. However, always ensure your dog is on a leash and that you clean up after them to preserve the natural environment for all visitors.

This trail is rich in history! You'll traverse the site of Daniels, an abandoned mill town from the 1800s. Look for numerous ruins, including old stone fences, remnants of buildings, an old Roman Catholic church, a cemetery, and even abandoned 1950s cars. The Old Main Line itself is part of the original Baltimore and Ohio (B&O) Railroad. You can also find the legitimate Camel's Den Cave and the Daniels Dam.

Spring is particularly beautiful, as much of the forest floor is covered in greenery and blooms. However, the trail offers unique scenery year-round, from lush summer foliage to vibrant fall colors and stark winter views of the historical ruins. Consider visiting during cooler months to avoid dense crowds and summer heat.

As this trail is located within Patapsco Valley State Park Daniels Area, there may be an entrance fee depending on the day of the week and time of year. It's best to check the official Maryland State Parks website for current fee schedules and any specific regulations before your visit.

Access to this loop is typically from the Daniels Area of Patapsco Valley State Park. There are designated parking areas within the Daniels Area. It's advisable to arrive early, especially on weekends, as parking can fill up quickly.

Yes, the trail offers picturesque river views, especially along the Old Main Line section which closely follows the Patapsco River. If you take some of the more strenuous climbs up the hillsides, you'll be rewarded with lovely views of the valley below and the historical ruins.

Yes, the route also passes through sections of the Patapsco Alt HoCo Thru Trail, the Patapsco Howard County Thru Trail, and the Patapsco Traverse (south hiking).

For a more varied experience, don't stick solely to the flat riverside path. While the Old Main Line is easy, taking a sharp turn left up a hill can lead to more strenuous sections with rewarding views and access to more of the fascinating historical ruins. This allows you to tailor your hike from easy riverside walks to more challenging climbs.