Mammoth Access Boat Ramp
Mammoth Access Boat Ramp is a public access point in Jefferson County, Missouri, providing access to Big River. It sits within the Calico Creek-Big River watershed.
Sourced from Missouri Department of Conservation . Last checked against the source on July 7, 2026.
Boat ramps on Big River
We track 4 public boat ramps on Big River, including this one. If you're planning to spend your time on a different stretch of the water, one of the launch points below may put you closer to where you're actually headed than Mammoth Access Boat Ramp does — they're listed here in order of distance from this ramp.
- Washington State Park Access 2.5 mi away
- Merrill Horse Access 3.4 mi away
- Brown's Ford Access 6.5 mi away
Other boat ramps in Jefferson County
Jefferson County tracks 5 public boat ramps in total, spread across several different rivers, creeks and lakes — not just Big River. Each one below shows which waterbody it's on, so you can tell at a glance whether it actually connects to the same water as Mammoth Access Boat Ramp or leads somewhere completely different.
- Mammoth Access Big River less than 0.1 mi away
- Merrill Horse Access Big River 3.4 mi away
- Brown's Ford Access Big River 6.5 mi away
- Truman Access Mississippi River 22 mi away
- Flamm City Access Meramec River 27 mi away