River Mill Marina is a minor waterways facility situated on the canalized section of the River Great Ouse, positioned roughly a quarter of a furlong south of Eaton Socon Lock No. 8 and approximately 13 miles northeast of Bedford.

It serves as an access point on this popular inland waterway in the east of England. The marina offers a winding point, allowing boaters to turn their vessels.

It lies within easy reach of several locks and other waterway features along the Great Ouse, making it a useful reference point for passage planning on this stretch of river.