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Hiking trails & Routes
United States
Maryland
Harford County

Boundary Trail

Moderate

4.8

(1159)

17,320

hikers

Boundary Trail

02:16

8.46km

100m

Hiking

Hike the moderate 5.3-mile Boundary Trail loop in Gunpowder Falls State Park, gaining 335 feet over 2 hours and 16 minutes.

Last updated: February 26, 2026

Waypoints

A

Start point

Parking

Get Directions

1

56 m

Sweet Air Area Trailhead

Highlight • Trail

Right next to the parking lot of Sweet Air Area in Gunpowder Falls State Park, you will find this trailhead, including a map with all trails in the area. In …

Tip by

2

3.03 km

Boundary Trail

Highlight (Segment) • Trail

Boundary Trail is the longest trail in distance in the Sweet Air Area of Gunpowder Falls State Park. It leads along Green Glade Pond and crosses multiple creeks in the forest.

Tip by

B

8.46 km

End point

Parking

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Way Types & Surfaces

Way Types

7.63 km

759 m

< 100 m

< 100 m

Surfaces

7.63 km

759 m

< 100 m

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Elevation

Elevation

Nothing selected – click and drag below to see the stats for a specific part of the route.

Highest point (170 m)

Lowest point (110 m)

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Weather

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Saturday 11 July

30°C

19°C

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Frequently Asked Questions

Where does the Boundary Trail start and where can I park?

The route for the Boundary Trail typically starts at the Sweet Air Area Trailhead within Gunpowder Falls State Park. Parking is usually available at or near this trailhead.

Are there any entrance fees or permits required for Gunpowder Falls State Park?

Yes, Gunpowder Falls State Park may have entrance fees, especially during peak seasons or for certain amenities. It's always best to check the official Maryland Department of Natural Resources website (e.g., usda.gov for general park information, but specifically look for Maryland DNR or Gunpowder Falls State Park for current fee schedules) for the most up-to-date information on fees and any specific permit requirements for activities within the park.

Is the Boundary Trail suitable for beginners?

Rated as 'moderate', this trail offers a good challenge without being overly strenuous. With a distance of about 8.5 km and an elevation gain of around 100 meters, it's manageable for hikers with some experience, but beginners should be prepared for a few hours of walking.

What is the terrain like on this route?

The terrain on this route is varied, typical of a moderate hike. You can expect a mix of natural surfaces, potentially including dirt paths, some roots, and small rocks. Given its location in a state park, the trail is generally well-maintained but can be uneven in places.

When is the best time of year to hike the Boundary Trail?

Spring and fall are generally the best times to hike this trail. In spring, you'll enjoy milder temperatures and blooming wildflowers. Autumn offers comfortable weather and beautiful fall foliage. Summer can be warm and humid, while winter hiking is possible but may require appropriate gear for colder conditions or potential ice.

Can I bring my dog on the Boundary Trail?

Generally, dogs are allowed on trails in Gunpowder Falls State Park, but they must be kept on a leash at all times. Always check the specific regulations for the park before your visit to ensure compliance.

Is the Boundary Trail a loop or an out-and-back route?

The specific route highlighted, 'Sweet Air Loop via Boundary Trail', indicates that it is designed as a loop trail, bringing you back to your starting point without retracing your steps.

What notable features or viewpoints can I expect along the route?

The primary feature of this route is the Boundary Trail itself, offering a scenic hiking experience within Gunpowder Falls State Park. While specific panoramic viewpoints aren't detailed, the natural setting of the park provides pleasant forest scenery.

Does this trail connect with other paths?

Yes, this route utilizes sections of several other trails within the park. You'll find yourself on parts of the Barley Pond Loop, Pine Loop, Little Gunpowder Trail (white), Gas Pipeline Trail, Cody Jean Trail (green), Black Forest Trail (red), Orange Blaze, and Yellow Trail, among others.

Are there any facilities like restrooms or water sources along the trail?

As a natural trail within a state park, facilities like restrooms and potable water sources are typically limited to the main trailhead areas, such as the Sweet Air Area Trailhead. It's advisable to carry enough water for your hike and use facilities before starting.

What should I bring for a hike on this trail?

For a moderate hike of this length, you should bring comfortable hiking shoes, sufficient water, snacks, a map or GPS device (like the komoot app), and appropriate clothing for the weather. Sun protection and insect repellent are also recommended, especially during warmer months.

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