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Mountain biking trails

United States

Missouri

St. Charles County

Historic Bridge – Defiance loop from Weldon Spring Site Interpretive Center

Routes

Mountain biking trails

United States

Missouri

St. Charles County

Historic Bridge – Defiance loop from Weldon Spring Site Interpretive Center

Moderate

3.0

(13)

riders

Historic Bridge – Defiance loop from Weldon Spring Site Interpretive Center

02:46

34.4km

280m

Mountain biking

Moderate mountain bike ride. Good fitness required. Suitable for all skill levels. The starting point of the route is right next to a parking lot.

Last updated: May 26, 2026

Tips

Your route passes through protected areas

Please check local regulations for:

Weldon Spring Conservation Area

Katy Trail State Park

Waypoints

Start point

Parking

Get Directions

275 m

Weldon Spring Site

Highlight • Monument

The Weldon Spring Site has an interesting past. They used to dump building rubble containing uranium and radium, along with other radioactive materials inside the mound. Nowadays you can climb …

Tip by

847 m

Hamburg Trail

Highlight (Segment) • Trail

The Hamburg Trail connects the Katy Trail with the August A. Busch Memorial Conservation Area. It's a vital 6-mile trail that connects to both the Mound and Lost Valley areas.

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2.64 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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3.88 km

Weldon Spring Conservation Area

Highlight • Forest

Weldon Spring Conservation Area is an 8,398-acre park managed by the Missouri Department of Conservation. The park's border runs along the Missouri River.

Tip by

3.93 km

Short singletrack

Highlight (Segment) • Trail

Really fun. The downhill toward the east is often a ditch from the water washing it out. The clays within can be slippery if wet so be prepared. The stream crossing was great

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8.59 km

Lost Valley Trail

Highlight (Segment) • Trail

This is what I was looking for. Narrow singletrack that runs along the terrain. Often off camber with lots of gravel sized rocks mixed in with clay and organic soils. …

Tip by

21.8 km

Historic Bridge

Highlight • Bridge

Here you will reach a historic iron bridge that spans over Femme Osage Creek just before entering Defiance. This is a particularly significant part of the Katy Trail, adding to its historical charm.

Tip by

24.4 km

Defiance

Highlight • Settlement

Defiance is a small town situated along Highway 94 and the Katy Trail. Serving as a gateway to the Missouri wine country, whether you're beginning, ending, or simply taking a …

Tip by

34.4 km

End point

Parking

Way Types & Surfaces

Way Types

19.7 km

14.5 km

130 m

Surfaces

14.5 km

11.6 km

8.18 km

130 m

Elevation

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

Highest point (210 m)

Lowest point (140 m)

Weather

Today

Saturday 4 July

33°C

23°C

88 %

Additional weather tips

Max wind speed: 11.0 km/h

to get more detailed weather forecasts along your route

Comments

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Historic Bridge – Defiance loop from Weldon Spring Site Interpretive Center

Weldon Spring Site

Hamburg Trail

Weldon Spring Conservation Area

Weldon Spring Conservation Area

Short singletrack

Lost Valley Trail

Historic Bridge

Defiance

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