O'Neal Lake is a small shallow lake located in Northern Emmet County. It drains from Lawrence Lake and has one outlet, the headwaters of Big Sucker Creek. O'Neal Lake is part of the Lake Michigan watershed with the mouth of Big Sucker Creek flowing out into Lake Michigan. The land cover surrounding O'Neal Lake is predominantly forested wetland and some upland.

This access site on O'Neal Lake is at the end of an unimproved dirt road and has a gravel ramp and very limited parking. This shallow lake is only suitable for kayaks, canoes and small boats.

The Dam that maintains O'Neal Lake's level failed in the fall of 2014 draining the lake. In 2017 a new dam was built, shown above, keeping the lake at it's current level.    The O'Neal Lake Trail Loop runs over the river just behind the dam. The 15 mile loop through Wilderness State Park and is designated as part of the North Country Trail. This national trail winds from North Dakota to New York.