Chaffey Auto Body Mountain Time Trial
The San Gabriel Mountains feature many picturesque and challenging climbs. Glendora Mountain Road (GMR to locals) in the Angeles National Forest ranks among the most popular climbs in Southern California. GMR poses a varying pitch between 4.5 - 6.5 percent with a dizzying array of corners, as it twists and turns up the mountainside. The course is 4.25 Miles long with a total elevation gain of 1257 ft.