Onamia Lake
About Onamia Lake
Onamia Lake is a 1,044-acre lake near Onamia in Mille Lacs County, Minnesota. It reaches 10 feet at its deepest point, and has roughly 17.8 miles of shoreline.
The DNR has no fish survey on file for this lake, so treat any fishing as exploratory.
The DNR lists public water access for the lake; confirm the launch type before towing a trailer in. Soo Line Trail / Onamia KOA and Soo Line Trail Campground are mapped close to the shoreline for overnight stays. The lake is listed as infested with zebra mussel — clean, drain and dry your boat and gear before leaving.
Plan Your Visit to Onamia Lake
- 1,044 acres, up to 10 feet deep, near Onamia
- Public access on record — bring a boat you can hand-launch unless you confirm a ramp
- Camping close to the water at Soo Line Trail / Onamia KOA and Soo Line Trail Campground
- Listed as infested with zebra mussel — clean, drain and dry before you leave
Access & Fees
- Public access
- Public access on record
- Launch fee
- Free at DNR accesses
Conditions
- Surface area
- 1,044 acres
- Max depth
- 10 ft
- Shoreline
- 17.8 mi
- Shallows (under 15 ft)
- 1,040 acres
Rules & Regulations
- A Minnesota fishing license is required for anglers 16 and older
- Drain plugs must be out and all water drained before leaving any access; remove aquatic plants from boats and trailers
- Children under 10 must wear a life jacket on a boat that is underway
Facilities
- Camping: Soo Line Trail / Onamia KOA and Soo Line Trail Campground
Best For
- Lakeside camping
- Ice is never completely safe — check thickness yourself before walking or driving on any lake
Camping & Reservations
Soo Line Trail / Onamia KOA and Soo Line Trail Campground are mapped on or near Onamia Lake. Minnesota state park sites are booked through the DNR reservation system, national forest campgrounds through Recreation.gov, and most state forest campgrounds are first-come, first-served.
Campground locations © OpenStreetMap contributors. Confirm details with the operator.
Activities
Amenities
Fish Species
Plan your trip to Onamia Lake
Compare Onamia Lake against the top-ranked lakes nearby, then map your route.
Nearby Lakes
Shakopee Lake
54 out of 100 Lake ScoreMille Lacs · Onamia584 acres
2.8 miles away
Ogechie Lake
42 out of 100 Lake ScoreMille Lacs · Vineland409 acres
6.3 miles away
Peavy Lake
63 out of 100 Lake ScoreMorrison · Sullivan140 acres
10.5 miles away
Whitefish Lake
40 out of 100 Lake ScoreCrow Wing · Garrison709 acres
10.8 miles away
Mille Lacs Lake
81 out of 100 Lake ScoreMille Lacs · Garrison128,250 acres
10.9 miles away
Long Lake
55 out of 100 Lake ScoreMorrison · Sullivan126 acres
11.4 miles away
Frequently Asked Questions
Where is Onamia Lake?
Onamia Lake is in Mille Lacs County, Minnesota, near Onamia. It covers 1,044 acres and reaches 10 feet deep.
How big and how deep is Onamia Lake?
Onamia Lake covers 1,044 acres with about 17.8 miles of shoreline. Its maximum depth is 10 feet.
What fish can you catch at Onamia Lake?
The DNR has no fish survey on file for Onamia Lake.
Is there a public boat launch on Onamia Lake?
Public access is on record, but not a trailer ramp: public access on record.
Can you swim at Onamia Lake?
There is no mapped public swim beach at Onamia Lake. Minnesota's public waters are open to swimming where you have legal access, but there are no lifeguards or water-quality monitoring away from designated beaches.
Can you camp at Onamia Lake?
Yes. Soo Line Trail / Onamia KOA and Soo Line Trail Campground are mapped on or near the shore. Confirm whether sites are reservable or first-come, first-served before you go.
Does Onamia Lake have invasive species?
Yes. The DNR lists Onamia Lake as infested with zebra mussel. State law requires you to clean off plants, pull the drain plug and drain all water before leaving the access.