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Mammoth Access

Verified
Jefferson County, Missouri, 63020→|Big River→

Location

GPS Coordinates

About This Ramp

Surface
Unpaved
USGS3 data sourcesUpdated Mar 2026

Nearby Ramps

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16 mi
Bonne Terre City Lake
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Mammoth Access is a public boat ramp on Big River in Jefferson County, Missouri (63020). GPS coordinates: 38.1213°N, 90.6759°W.