Trail to Justice (Heartsong Presents)

is book #850 of the Heartsong Presents line.
==Book Description==
Ruby finds freedom on the back of her horse, Lancelot. When the chance to compete in a hundred-mile endurance ride arises, Ruby is eager to hit the trail.
Chuck finds his social life on the upswing when Ruby agrees to join him on a day-long trail ride in the mountains. And riding alongside her in the Wyoming 100 is even better. But when a friend takes a bad fall and Chuck discovers the wreck of a drug dealer's airplane, the ride turns into a sinister fight for life.
Will Ruby and Chuck ever get a chance to turn their friendship into something more?
(Description from fictiondb.com)