Routes

Planner

Features

Updates

App

Login or Signup

Get the App

Login or Signup

Routes
Hiking trails & Routes
United States
Maryland
Montgomery County

River Otter and Rachel Carson Greenway Loop

Easy

3.3

(16)

84

hikers

River Otter and Rachel Carson Greenway Loop

01:29

5.48km

80m

Hiking

The River Otter and Rachel Carson Greenway Loop offers a serene escape into a surprisingly wild landscape, perfect for a peaceful outing. You'll wander through dense forests, catch glimpses of the Hawlings River, and discover striking rock formations and a restored wildflower meadow. The trail provides a genuine sense of wilderness, making it a fantastic option for those who love varied natural scenery.

This easy 3.4-mile (5.5 km) hiking loop involves 246 feet (75 metres) of elevation gain and typically takes about 1 hour and 29 minutes to complete. While there are roots and some noticeable inclines, the trail is generally well-cleared and accessible. It's a great choice for a relatively quick, rewarding hike without extreme challenges, suitable for most fitness levels.

Beyond its natural beauty, the park holds significance as it's named after renowned biologist Rachel Carson, who lived nearby. This area is a haven for biodiversity, with opportunities to spot nesting eagles, deer, and even river otters. It's a wonderful place to connect with nature and appreciate the rich ecological heritage of Montgomery County.

Last updated: June 9, 2026

Tips

Your route passes through a protected area

Please check local regulations for:

Rachel Carson Conservation Park

Waypoints

A

Start point

Get Directions

1

509 m

River Otter Trail

Highlight (Segment) • Trail

The River Otter Trail provides a side entrance into the Rachel Carson Conservation area. It links up with the other trails in the park after crossing the Hawlings River and can be hiked as an out and back or looped with the other trails.

Tip by

2

1.58 km

Hawlings River

Highlight • River

Hawlings River is a 12.9-mile-long (20.8 km) tributary of the Patuxent River in Montgomery County, Maryland.

Tip by

3

2.40 km

Fern Valley Trail

Highlight (Segment) • Trail

A nice trail a little further out than some of the others in the park, which means you usually encounter fewer people and get more time to yourself. It can get muddy after a rain, so it's best to wait until the trail has time to dry off.

Tip by

B

5.48 km

End point

Loading

Way Types & Surfaces

Way Types

5.06 km

364 m

< 100 m

Surfaces

5.06 km

364 m

< 100 m

Sign up to see more specific route details

Sign up for free

Elevation

Elevation

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

Sign up to see more specific route details

Sign up for free

Weather

Powered by Foreca

Today

Sunday 12 July

28°C

19°C

55 %

Additional weather tips

Max wind speed: 13.0 km/h

to get more detailed weather forecasts along your route

Comments

guide_signup

Want to know more?

Sign up for a free komoot account to join the conversation.

Sign up for free

This route was planned by komoot.

Save

Edit route

Download GPX

Move start point

Print

Share

Embed on a website

Report an Issue

Report restricted access

Frequently Asked Questions

Is the River Otter and Rachel Carson Greenway Loop suitable for beginners or families?

Yes, the River Otter Trail, especially when combined with the Fern Valley Trail, is generally considered easy and suitable for most fitness levels, including families. However, some sections of the broader Rachel Carson Greenway can be more challenging with natural surfaces, embedded rocks, and hills, which might be more demanding for very young children.

What is the terrain like on this loop trail?

The terrain primarily consists of natural surface trails, often with embedded rocks and uneven sections. Hikers should be prepared for potential muddy areas, especially after rain. While much of the trail is natural, some sections, particularly after crossing Colesville Road and the Capitol Beltway, are paved. There are also 'rustic' sections designated exclusively for hikers within the broader Rachel Carson Greenway.

What kind of scenery can I expect along the route?

You can expect to traverse dense woodlands and open meadows, offering a blend of natural environments. The trail provides picturesque views of the Hawlings River and Northwest Branch. The park boasts high-quality forest and striking rock outcroppings. A notable scenic highlight on the Rachel Carson Greenway Trail near Burnt Mills West Special Park is a beautiful waterfall.

What wildlife might I see along the route?

The area is rich in wildlife, offering opportunities to spot various bird species, deer, salamanders, and frogs, particularly when vernal pools appear. The park is recognized as one of the county's premier conservation areas, densely populated with numerous species.

Where can I park to access the River Otter and Rachel Carson Greenway Loop?

While specific parking details are not provided, the River Otter Trail provides a key side entrance into the Rachel Carson Conservation Area, which is part of the larger Rachel Carson Conservation Park. Look for designated parking areas within or adjacent to the park.

Are dogs allowed on the trail?

Information regarding dog-friendliness for this specific loop is not provided in the available data. It is always recommended to check the official regulations for Rachel Carson Conservation Park regarding pets before your visit.

Do I need a permit or pay an entrance fee for the Rachel Carson Conservation Park?

The available information does not specify any permit requirements or entrance fees for Rachel Carson Conservation Park. However, it's always advisable to check the official park website or local regulations for any updates before your visit.

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

The best time to visit can depend on your preferences. Spring and fall generally offer pleasant temperatures and beautiful foliage. Spring also brings the appearance of vernal pools, increasing chances of spotting salamanders and frogs. Be prepared for potential muddy areas after rain, regardless of the season.

Does the trail connect with other paths in the area?

Yes, the route is part of a larger interconnected trail system. The River Otter Trail links up with other trails within the Rachel Carson Conservation Park. The overall Rachel Carson Greenway is part of a larger planned 25-mile trail system, connecting various neighborhoods, parks, and recreational areas. The route also passes through sections of the Rachel Carson Greenway, Fern Valley Trail, and Hidden Pond Trail.

What notable features or historical points can I find along the way?

The trail system is named in honor of Rachel Carson, the pioneering environmentalist and author of 'Silent Spring.' A point of interest along some routes is the historic Burnt Mills Dam, offering a glimpse into the region's past. The park itself is known for its high-quality forest and striking rock outcroppings.

How long does it typically take to complete the River Otter and Rachel Carson Greenway Loop?

The estimated duration for this specific loop is approximately 1 hour and 29 minutes, covering a distance of about 5.5 kilometers (3.4 miles). This duration can vary based on your pace and how often you stop to enjoy the scenery.

Nearby routes

Hard

4.8

487

Great Falls Overlook via Billy Goat Trail Section A

02:38h

9.70km

50m

Explore
RoutesRoute plannerFeaturesHikesMTB TrailsRoad cycling routesBikepackingSitemap
Download the app
Follow Us on Socials

© komoot GmbH

Privacy Policy