Mammoth Access

Mammoth Access is a Missouri Department of Conservation boat ramp located in De Soto, Jefferson County, offering convenient public access to the Big River. The site features a concrete boat ramp suitable for launching kayaks, canoes, and small motorboats, along with parking and vault toilet facilities. This 4.75-acre access point is well-suited for paddlers looking to explore this section of the Big River.

**Important Considerations:** The Big River is subject to significant water level fluctuations and seasonal flooding, which can affect ramp conditions and paddling difficulty. Be prepared for varying river conditions and check water levels before your trip. The area is open for public use during specific hours, though boat launching is permitted 24 hours daily where allowed. After high water events, expect debris along the banks and potentially muddy ramp conditions. This is a popular put-in for float trips in the area.