
About This Spring
## Overview The 400 Trail Spring is a public drinking spring located along the famous 400 State Trail near Wonewoc, Wisconsin, in Sauk County. The spring sits at the intersection of Highway 33 and the 400 Bike Trail, on the east side of Strawbridge Road. Named after the former Chicago and North Western Railway's "400" passenger train that once ran along this corridor, the 400 State Trail is a beloved 22-mile crushed limestone path stretching from Elroy to Reedsburg through the scenic Baraboo Range and Driftless Area of southwestern Wisconsin. This natural spring has long served as a refreshing stop for cyclists, hikers, and trail users passing through the rolling hills and sandstone bluffs of the region. The Driftless Area is known for its abundant cold-water springs, fed by groundwater filtering through layers of ancient sandstone and dolomite. These geological formations give the region some of the cleanest and most mineral-rich spring water in the Upper Midwest. The 400 Trail Spring has historically been used as a drinking water source by trail visitors and locals alike. ## Directions 1. Head to Wonewoc, Wisconsin, via State Highway 33. 2. Look for the intersection of Highway 33 and the 400 State Trail (bike trail crossing) just outside of Wonewoc. 3. The spring is located on the **east side of Strawbridge Road**, near where the trail crosses Highway 33. 4. GPS coordinates: **43.64024, -90.210513** 5. The nearest address is 2086 State Hwy 33, Wonewoc, WI 53968. Parking is typically available at nearby 400 Trail access points. If you're biking the trail, the spring makes for a convenient water stop between Elroy and Reedsburg. ## What to Expect The 400 Trail Spring is a roadside public drinking spring conveniently situated along one of Wisconsin's most popular rail-trail corridors. Visitors can expect a natural spring outlet accessible from the trail or Highway 33. The surrounding landscape features the lush, hilly terrain characteristic of the Driftless Area — expect wooded bluffs, pastoral farmland, and quiet country roads. The spring is most commonly visited during the warmer months (May through October) when the 400 State Trail sees peak cycling and hiking traffic. Water from springs in this region has been reported to be cold and clean-tasting, though as with any natural water source, conditions can vary seasonally. The area around Wonewoc also offers access to nearby attractions including Wildcat Mountain State Park and the famous Elroy-Sparta Trail, making this a great stop as part of a larger outdoor adventure in southwestern Wisconsin.
Getting There
Address
2086, State Hwy 33, Wonewoc, WI 53968, US
GPS Coordinates
43.640240, -90.210513
Directions
Community SubmittedDirections 1. Head to Wonewoc, Wisconsin, via State Highway 33. 2. Look for the intersection of Highway 33 and the 400 State Trail (bike trail crossing) just outside of Wonewoc. 3. The spring is located on the **east side of Strawbridge Road**, near where the trail crosses Highway 33. 4.
Categories
Water Safety Disclaimer
Try Water does not independently test, verify, or guarantee the quality, safety, or potability of any water source listed on this site. Listings are based on publicly available data, community contributions, and historical reports — not laboratory analysis.
Water conditions at natural springs can change at any time due to weather, contamination, agricultural runoff, seasonal variation, or other environmental factors. A spring that was safe to drink from yesterday may not be safe today.
Always test water yourself before drinking. We strongly recommend using a portable water testing kit or filter (such as a LifeStraw) and consulting local health authorities when in doubt. Never rely solely on the information provided here when making decisions about drinking from a natural water source.
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Quick Facts
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Tips
Bring empty jugs or bottles to fill up.
Accessible by road — pull off carefully.
Parking available nearby.
Safety Info
Always test or filter water from natural springs before drinking. Water quality can change seasonally.
Bring your own containers. A portable water filter like a LifeStraw is recommended.
Respect the environment. Pack out everything you bring in.