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Hiking trails & Routes
United States
Maryland
Baltimore County

Hemlock Gorge Extended Loop

Hard

5.0

(8775)

18,322

hikers

Hemlock Gorge Extended Loop

03:13

11.0km

290m

Hiking

Embark on the Hemlock Gorge Extended Loop, a difficult hiking route that immerses you in a landscape of moss-covered terrain, dark forests, and striking rocky formations. This challenging trail spans 6.8 miles (11.0 km) and features a significant elevation gain of 956 feet (292 metres), offering water views and following streams through a rainforest-like atmosphere. You can expect to complete this hike in approximately 3 hours and 12 minutes, enjoying the hemlock and oak trees and a lush fern understory, with a small waterfall adding to the scenic beauty.

Located within the Prettyboy Reservoir Cooperative Wildlife Management Area, parking is generally available for your visit. Be prepared for sections where the path transitions from old fire roads to more technical singletrack. Always check local conditions before you head out, especially during autumn and winter when the landscape transforms with natural moss and icicles, which can affect trail conditions.

Beyond its natural allure, the route holds a unique historical element with an old cemetery featuring gravestones dating back to the 1700s. This adds a fascinating cultural layer to your journey through Hemlock Gorge, making it more than just a hike. The trail's setting within the Prettyboy Reservoir area also highlights its importance for wildlife and natural preservation.

Last updated: April 23, 2026

Tips

Includes a segment that may be dangerous

A part of this route comprises technical, difficult, or hazardous terrain. Specialist equipment and prior experience may be required.

After 5.49 km for 527 m

Waypoints

A

Start point

Parking

Get Directions

1

5.67 km

Hemlock Gorge

Highlight • Gorge

B

11.0 km

End point

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Way Types & Surfaces

Way Types

7.02 km

2.63 km

817 m

526 m

Surfaces

10.2 km

747 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 (260 m)

Lowest point (160 m)

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Weather

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Today

Thursday 2 July

40°C

23°C

0 %

Additional weather tips

Max wind speed: 13.0 km/h

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Frequently Asked Questions

How long does it typically take to complete the Hemlock Gorge Extended Loop?

This hike is approximately 11 kilometers (6.8 miles) long and generally takes about 3 hours and 13 minutes to complete. However, your actual time may vary depending on your pace and how often you stop to enjoy the scenery.

What is the terrain like on the Hemlock Gorge Extended Loop?

The terrain is quite varied and can be challenging. You'll encounter moss-covered landscapes, dark forests, and rocky formations. Sections include old fire roads and transition to singletrack paths that can become technical. The trail also features streams and areas with an abundance of moss and natural icicles, especially in cooler months.

Is the Hemlock Gorge Extended Loop suitable for beginners?

Given its 'difficult' grading, varied terrain, and technical singletrack sections, this loop is generally not recommended for beginners. Hikers should have a good level of fitness and some experience with challenging trails.

What natural features and landmarks can I expect to see along the way?

You'll experience the natural beauty of Hemlock Gorge, with its moss-covered landscapes and rocky formations. Keep an eye out for an old cemetery with gravestones dating back to the 1700s, massive fungi, and a small waterfall. The ecosystem features hemlock and oak trees with an understory of ferns, creating a rainforest-like atmosphere in places.

Where can I park for the Hemlock Gorge Extended Loop?

Specific parking details for this exact loop are not provided, but for trails within Prettyboy Reservoir Park, it's advisable to look for designated parking areas near trailheads. Always check local signage for official parking locations and regulations.

Is the Hemlock Gorge Extended Loop dog-friendly?

While many trails in similar natural areas are dog-friendly, specific regulations for the Hemlock Gorge Extended Loop within Prettyboy Reservoir Park should be verified. Generally, if dogs are permitted, they must be kept on a leash.

What is the best time of year to hike this loop?

The trail offers different experiences throughout the year. During autumn and winter, the abundance of moss and natural icicles can create an 'enchanted forest' feel. However, be prepared for potentially technical sections that might be more challenging in wet or icy conditions. Spring and summer offer lush greenery, but ensure you're prepared for potential humidity and insects.

Are there any permits or fees required to hike in Prettyboy Reservoir Park?

Prettyboy Reservoir Park is part of the Prettyboy Reservoir Cooperative Wildlife Management Area. It's important to check with local authorities or the park's official website for any specific permits, entrance fees, or regulations that might apply to hiking or accessing certain areas within the park.

Does the Hemlock Gorge Extended Loop intersect with other paths?

Yes, this route incorporates sections of several other trails. You will hike along parts of the Hemlock Gorge Trail and the Gunpowder River Railroad path during your journey.

What should I wear and bring for this hike?

Given the 'difficult' rating and varied terrain, sturdy hiking boots with good ankle support are essential. Dress in layers suitable for the weather, and bring plenty of water, snacks, and a map or GPS device. Trekking poles can be helpful for the technical and rocky sections.

Is this a loop trail?

Yes, as the name suggests, the Hemlock Gorge Extended Loop is a circular route, meaning you will end up back near your starting point without having to retrace your steps.

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