Book excerpt: Featuring more than 40 of Northern Virginia and Maryland's greatest mountain bike rides. Includes GPS-Quality, digitally-designed shaded relief maps detailing each ride; helpful ride locator maps get you to the ride without getting lost; accurate route profiles show the ups and downs of each ride; fascinating 3-D surface maps with dramatic views of the surrounding terrain; in-depth trail descriptions with difficulty ratings; detailed route directions; schedules, local attractions, eateries, and more