Wyoming /
Grayrocks Reservoir
Reservoir in Wyoming · 2,832 acres · near Guernsey
Grayrocks Reservoir has 3 boat ramps listed as public.
Past algal blooms
Harmful algal blooms reported on this water (state reports compiled by U.S. EPA): 2025 and 2026.
state reports compiled by U.S. EPA · checked October 18, 2026
Launches
- Grayrocks Reservoir Gate 1 Ramp · Boat ramp · near Guernsey
- Grayrocks Reservoir Gate 7 Ramp · Boat ramp · near Guernsey
- Grayrocks Reservoir Public Access Area · Boat ramp · near Guernsey
Community
Where people who fish, boat and paddle Grayrocks Reservoir talk about it. Lake associations, clubs and local groups will be added as we find them.