Joined: Dec 2004
Posts: 12,560
Likes: 799
From: Middle of da Mitten
Bikes: Trek 7500, RANS V-Rex, Optima Baron, Velokraft NoCom, M-5 Carbon Highracer, Bacchetta Quattro, Catrike Speed
According to a search or two, American Quarterhorses can hit nearly 50 mph at the finish line. But it's all sprint; their name says their specialty - they were bred for very short (quarter-mile) races. I've heard it said that a trained long-distance runner (human) can run a horse to death.
Funny, my wife's quarterhorse is usually going about... zero.