North Dakota / Lake Ashtabula /

Karnack Bridge

Boat ramp · on Lake Ashtabula · near Cooperstown · North Dakota

Invasive species

North Dakota Game and Fish has found zebra mussels (found 2021) and curly-leaf pondweed (found 2016) in this water. Clean, drain and dry your boat, trailer and gear before you leave, and do not move water, plants or live bait to another water.

North Dakota Game and Fish · checked October 18, 2026

Past algal blooms

Harmful algal blooms reported on this water (state reports compiled by U.S. EPA): 2016 and 2026.

state reports compiled by U.S. EPA · checked October 18, 2026

Status not reported No closure has been posted for this launch, but its agency does not publish open or closed status. Check with the managing agency before you tow.

At the launch

Type
Boat ramp
Docks
1
Ramp surface
Plank
Managed by
U.S. Army Corps of Engineers
Coordinates
47.26934, -98.01131

Directions (Google) Apple Maps

Depth contours in feet from North Dakota Game and Fish (fieldwork 2020). Not for navigation.

Conditions

Lake level: Lake Ashtabula

Today's level loads here; without it, see the agency's page below.

Full pool is 1,266.0 ft (USACE, Top of Conservation).

Level from U.S. Army Corps of Engineers, Corps Water Management System (Baldhill Dam at Lake Ashtabula), about hourly; the agency's page. Levels change; check conditions at the ramp before you launch.

On Lake Ashtabula

Lake in North Dakota. All launches on Lake Ashtabula.

Community

Where people who use Lake Ashtabula talk about it.

Nearby launches

Sources

Why it is listed as public: listed by North Dakota Game and Fish Department Boating Access Sites and U.S. Army Corps of Engineers boat ramps (FHWA Federal Lands Transportation Facility Inventory). Something wrong, or is this launch private? Send a correction; it goes to a person.