Geologic Time Trail is a hiking trail in Wheeler County, Oregon. It is within John Day Fossil Beds National Monument. It is 0.3 miles long and begins at 1,500 feet altitude. Traveling the entire trail is 0.5 miles with a total elevation gain of 77 feet. Near the trailhead there are parkings and restrooms. The Palisades (elevation 1,594 feet) cliff can be seen along the trail.