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Routes
Hiking trails & Routes
United States
Missouri
St. Charles County

Lost Valley, Abandoned Road, and Hamburg Trail Loop

Routes
Hiking trails & Routes
United States
Missouri
St. Charles County

Lost Valley, Abandoned Road, and Hamburg Trail Loop

Moderate

3.2

(10)

72

hikers

Lost Valley, Abandoned Road, and Hamburg Trail Loop

03:34

13.4km

150m

Hiking

Hike the moderate 8.3-mile Lost Valley, Abandoned Road, and Hamburg Trail Loop, featuring historical remnants and diverse wildlife.

Last updated: February 26, 2026

Tips

Your route passes through a protected area

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Waypoints

A

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Parking

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1

11.6 km

Weldon Spring Conservation Area

Highlight • Forest

From tough singletrack to smooth double-track, the Weldon Spring Conservation Area has a variety of trails that are great for riding. Be aware: just because a trail has the word …

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13.4 km

End point

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Way Types & Surfaces

Way Types

12.2 km

1.16 km

Surfaces

7.73 km

4.61 km

883 m

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Elevation

Elevation

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Highest point (220 m)

Lowest point (140 m)

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Weather

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Today

Thursday 7 May

20°C

3°C

0 %

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Max wind speed: 18.0 km/h

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This route was planned by komoot.

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Frequently Asked Questions

How long does it typically take to complete this loop?

The Lost Valley, Abandoned Road, and Hamburg Trail Loop is approximately 13.4 kilometers (8.3 miles) long. Komoot estimates it takes around 3 hours and 34 minutes to complete, though some hikers report finishing it in about 2 hours and 29 minutes, depending on pace and stops.

What is the terrain like on the trail?

The trail offers varied terrain, starting with a gentle ascent through shaded woodland paths and open meadows. You'll encounter remnants of an abandoned road, which is now reclaimed by nature, and a relatively flat, serene section in the 'Lost Valley'. The Hamburg Trail portion is primarily a gravel path with an easy physical rating.

Is the trail suitable for beginners or families with children?

Rated as moderate, this loop is best suited for moderately experienced hikers. While the initial 2 kilometers are relatively easy, and the Hamburg Trail section is considered easy, the overall distance and varied terrain make it a bit more challenging than a simple beginner route. Families with younger children might find it long, but older, active children should manage well.

Where can I park to access the trailhead?

You can conveniently park at the Hamburg Trailhead parking lot, which is located within the Weldon Spring Conservation Area. This provides direct access to the start of the loop.

Are dogs allowed on the Lost Valley, Abandoned Road, and Hamburg Trail Loop?

Yes, dogs are generally allowed on this trail. However, it is crucial to keep them on a leash at all times to protect wildlife and ensure a pleasant experience for all trail users. Please also remember to clean up after your pet.

What kind of wildlife or natural features can I expect to see?

The 'Lost Valley' section is particularly rich in diverse flora and fauna. Hikers often spot various bird species, deer, and occasionally wild turkeys or foxes. The abandoned road section offers a unique historical element with old road signs and mile markers being reclaimed by vegetation.

Do I need a permit or pay an entrance fee for the Weldon Spring Conservation Area?

No, there are typically no permits required or entrance fees to access the Weldon Spring Conservation Area or its trails, including this loop. It is open to the public for recreational use.

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

Spring and fall are generally the best times to hike this loop, offering pleasant temperatures and vibrant scenery. Spring brings blooming wildflowers, while fall showcases beautiful foliage. Summer can be warm and humid, and winter conditions may include snow or ice, making some sections more challenging.

Does this route intersect with other well-known trails?

Yes, this loop incorporates significant portions of other established paths. The route covers sections of the Hamburg Trail (making up about 41-42% of the loop) and the Lost Valley Trail (approximately 35-12% of the loop), as well as the Abandoned Road section (about 26%).

Are there any notable viewpoints or landmarks along the way?

While there aren't specific panoramic viewpoints, the trail itself offers several points of interest. The remnants of the abandoned road provide a unique historical landmark, and the serene 'Lost Valley' is a natural highlight for wildlife viewing and immersion in nature. The entire loop is situated within the scenic Weldon Spring Conservation Area.

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