NORCO — Last year, when Mustang Heritage Foundation Executive Director Patti Colbert agreed that Norco, California, would host one of 10 nationwide Extreme Mustang Makeover events in 2009, the outcome was as predictable as grass under a leaky spigot. The winner would be the event itself.

“Horsetown USA,” with both its backdrop hills and downtown trails providing the challenge, hosted the fifth nationwide EMM event this year May 15-17