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Routes
Mountain biking trails
United States
South Dakota
Pennington County

Deerfield Lake Loop Trail #40L

Moderate

3.2

(5)

87

riders

Deerfield Lake Loop Trail #40L

01:47

18.7km

300m

Mountain biking

Mountain bike the moderate 11.6-mile Deerfield Lake Loop Trail #40L in Black Hills National Forest, featuring lake views and 989 feet of gai

Last updated: February 26, 2026

Tips

Your route passes through a protected area

Please check local regulations for:

Black Hills National Forest

Waypoints

A

Start point

Parking

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1

146 m

Sunset View of Deerfield Lake

Highlight • Viewpoint

Deerfield Lake Loop Trail leads around Deerfield Lake, at some points directly next to the lakeside. The trail is moderately flat with some gorgeous views of the lake and a …

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B

18.7 km

End point

Parking

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Way Types & Surfaces

Way Types

18.3 km

288 m

118 m

< 100 m

Surfaces

18.3 km

322 m

118 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 (1,910 m)

Lowest point (1,770 m)

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Weather

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Today

Friday 8 May

15°C

2°C

17 %

Additional weather tips

Max wind speed: 22.0 km/h

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This route was planned by komoot.

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Frequently Asked Questions

What is the difficulty level of the Deerfield Lake Loop Trail #40L for mountain biking?

This trail is rated as moderate for mountain biking. While it offers an enjoyable ride, some sections may present challenges for less experienced riders due to terrain or elevation changes. It's generally considered suitable for intermediate mountain bikers.

How long does it typically take to mountain bike this loop?

On average, mountain bikers can expect to complete the loop in approximately 1 hour and 47 minutes. This duration can vary based on your fitness level, pace, and how often you stop to enjoy the scenery.

What kind of terrain can I expect on the Deerfield Lake Loop Trail #40L?

The trail primarily follows the shores of Deerfield Lake, offering a mix of surfaces typical for forest trails. Expect some rolling hills, dirt paths, and potentially some rocky or rooty sections, especially given its moderate difficulty rating.

Are there any notable viewpoints or landmarks along the route?

Yes, one prominent highlight along the route is the Sunset View of Deerfield Lake, which offers stunning vistas of the lake, especially during the evening hours.

Does the trail intersect with other paths?

Yes, the route extensively follows the official Deerfield Trail for its entire length. It also incorporates significant sections of the Deerfield Lake Loop trail and smaller portions of Dutchman Road.

What is the best time of year to mountain bike the Deerfield Lake Loop Trail #40L?

The best time to ride is typically from late spring through early fall (May to October) when the weather is mild and the trail is free of snow and ice. Always check local conditions before heading out, especially in shoulder seasons.

Is the Deerfield Lake Loop Trail #40L dog-friendly?

Yes, dogs are generally welcome on trails within the Black Hills National Forest. However, they must be kept on a leash at all times to protect wildlife and ensure a pleasant experience for all trail users. Please remember to pack out any waste.

Do I need a permit or pay an entrance fee to access the trail?

The Deerfield Lake Loop Trail #40L is located within the Black Hills National Forest. Generally, there are no specific permits required for day-use mountain biking on most trails in the National Forest. However, always check the official Black Hills National Forest website for any current regulations or fee requirements, especially if you plan to camp or use developed recreation sites.

Where can I park to access the Deerfield Lake Loop Trail #40L?

Parking is available at various points around Deerfield Lake. The most common access points are near the campgrounds or day-use areas surrounding the lake. Look for designated parking lots that provide direct access to the trail system.

What should I wear or bring for mountain biking this trail?

Given the moderate difficulty and potential for varied terrain, it's recommended to wear appropriate mountain biking gear, including a helmet, gloves, and comfortable clothing. Bring plenty of water, snacks, a basic bike repair kit, and a map or GPS device. Sunscreen and insect repellent are also advisable.

Is the Deerfield Lake Loop Trail #40L suitable for families with children?

While the trail is rated moderate, its length and some elevation changes might be challenging for very young or inexperienced child riders. Families with older children who have some mountain biking experience may find it enjoyable. Consider the fitness and skill level of your group before attempting the full loop.

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