New Trails Fitness Hike at Pima Dynamite Trailhead This Very Difficult hike due to its 9 miles over about 4.5 hours covers some rolling hills for Experienced hikers. Explore the impressive new trails with nice views and granite formations. Arrive 15 minutes before start of hike. Bathrooms and water available at the trailhead. Bring water, snacks and even a lunch for the trail. No dogs please.