SBD Tours got a great shot of a bobcat out for a stroll at Otter Creek (Esch Rd) in the Sleeping Bear Dunes National Lakeshore. These cats are pretty reclusive so it's really rare to catch a shot like this!
The very excellent University of Michigan Museum of Zoology’s Animal Diversity Web hasinformation & photos about bobcat (Lynx rufus). You can find a lot more in the Wikipedia entry for Bobcat, which says that these cats are phenomenal climbers that are crepuscular (most active at twilight and dawn) and found all over North America. As to their size:
The adult male Bobcat is 28 to 47 inches long, averaging 36 inches; this includes a stubby 4 to 7 inch (10–18 cm) tail, which has a “bobbed” appearance and gives the species its name. An adult stands about 14 or 15 inches (36–38 cm) at the shoulders. Adult males usually range from 16 to 30 pounds (7–14 kg); females average about 20 pounds (9 kg). The Bobcat is muscular, and its hind legs are longer than its front legs, giving it a bobbing gait. At birth it weighs 0.6 to 0.75 pounds (280–340 g) and is about 10 inches (25 cm) in length. By its first year it will reach about 10 pounds (4.5 kg)