Coyote Summer (1996)

Teenage Callie has a wild streak. When her mother goes to London on business, she sends Callie to her sister's ranch for a dose of hard work and responsibility. Callie is sullen, at first, naturally, but perks up at the sight of a beautiful but wild black horse. When she overhears of the horse's destruction, due to his inability to be tamed, she arranges to steal the horse with a fellow ranch hand named Rafe. In hiding, the two begin to calm the horse and start his training. It works. But, will their hideaway be discovered?