How big are the tracks… that would tell you for sure. Wolf tracks are noticeably larger. I found this on the U.S. Fish and Wildlife Website…
Size is a key difference between coyotes and wolves. Coyotes range from 3.5 to 4.5 feet long, 16 to 20 inches high at the shoulder and 20 to 50 pounds. This is about half the size of a wolf. Coyotes tend to have gray or reddish brown fur with rusty colored legs, feet, and ears, and whitish fur on the throat and belly. Their ears are pointed and relatively long, and the muzzle is pointed and petite. The track size is about 2.5 inches long and 1.5 inches wide. Coyotes tend to carry their tail held below the back line. The tail may or may not be black tipped and is less than 18 inches long. In contrast, wolves have many color variations but tend to be buff-colored tans grizzled with gray and black (although they can also be black or white). Their ears are rounded and relatively short, and the muzzle is large and blocky. Wolves generally hold their tail straight out from the body or down. The tail is black tipped and over 18 inches long. A wolf track size is about 4.5 inches long and 3.5 inches wide.
Here’s the link for reference… kind of interesting
U.S. Fish and Wildlife Service – Gray Wolf Q and A’s