The Otter Lake Narrows Boat Ramp is a municipal boat launch situated at 121 Otter Lake Road in the Narrows section of Otter Lake, within Seguin Township, Parry Sound District, Ontario.

It is one of three public launch points serving Otter Lake, alongside facilities at the marina on the west end and the Long Arm on the east end.

The ramp features a gravel boat launch surface and a dock, providing boaters with straightforward access to this part of the lake.