Dunning Spring, Decorah, IA 52101

## Overview Dunning Spring is a stunning natural spring and waterfall located in the heart of Decorah, Iowa, within Winneshiek County. The spring feeds a picturesque waterfall that cascades approximately 200 feet down a limestone bluff into a lush, shaded ravine — one of the most photographed natural features in northeast Iowa's Driftless Area. This region, which escaped the flattening effects of the last glacial period, is known for its dramatic karst topography, where water carves through ancient limestone and dolomite bedrock to emerge as cold, clear springs. Dunning Spring Park is a beloved local landmark and a popular stop for visitors exploring Decorah's renowned network of trails, trout streams, and natural springs. The spring-fed waterfall is most impressive during spring snowmelt and after heavy rains, when the flow increases dramatically. Even during drier periods, the mossy rock face and surrounding old-growth vegetation make the site a peaceful retreat. The spring is classified as a public drinking spring, and the water has historically been used by locals and visitors alike, though water quality can vary with conditions. ## Directions 1. From downtown Decorah, head north on Water Street. 2. Turn left (west) onto Quarry Street. 3. Follow Quarry Street for approximately 0.2 miles. Dunning Spring Park will be on your left, near the address 203 Quarry Street. 4. A small parking area is available near the park entrance. The waterfall and spring are a short walk from the road. **GPS Coordinates:** 43.309657, -91.791812 ## What to Expect Visitors will find a well-maintained city park with a short, easy path leading to the base of the waterfall. The spring water flows over a tall limestone cliff face draped in moss and ferns, creating a cool, misty atmosphere even on warm summer days. The surrounding ravine is heavily wooded, offering shade and a sense of seclusion despite being just minutes from Decorah's downtown. The waterfall's flow is seasonal — it's at its most dramatic in spring and after significant rainfall, and may slow to a trickle during late summer dry spells. In winter, the falls can freeze into spectacular ice formations that attract photographers and ice climbers. The park is easily accessible and family-friendly, with no strenuous hiking required. It connects to Decorah's extensive trail system, including the Trout Run Trail, a paved multi-use path that loops through the area's scenic bluffs and valleys. Decorah is also home to a thriving community of bald eagles, and eagle-watching opportunities are common along the Upper Iowa River nearby. The spring water has been reported to be clean and refreshing, and visitors have historically collected water here, but conditions can change — especially after heavy rains when runoff may affect water quality.