Data Disclaimer: Water level data is provided by USGS and NOAA for informational purposes only. Verify conditions on-site before any water activities.
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**Location & Access:**
Main Dam Tailwaters provides a paved boat ramp for kayakers, canoeists, and motorboaters accessing the Grand River near Montello in Marquette County, Wisconsin. The site is managed by the US Army Corps of Engineers and offers convenient public access to this major waterway.
**River Conditions:**
The Grand River at this location is a substantial stream—the 8th order river (comparable in scale to major rivers like the Mississippi and Missouri) carries an average flow of over 5,400 cubic feet per second. The river here has a moderate gradient of 2.9 feet per mile, with average velocities around 2.7 feet per second. Paddlers should be prepared for the current typical of a major river system. This tailwater location downstream of the dam may experience variable water levels and flow depending on dam operations.
**Nearby Recreation:**
The Fox River National Wildlife Refuge is located in the area, encompassing over 1,000 acres of wetland and upland habitat in Marquette County, offering additional wildlife viewing and recreation opportunities. For complete information on amenities, parking, hours of operation, and current conditions, contact the US Army Corps of Engineers or check the Wisconsin DNR boat access listing at dnr.wi.gov/topic/Lands/boataccess/.