Head to Tucson, Arizona for this multi-distance running event featuring 5K, 10K, and half marathon options, with the race kicking off at 8:00 AM. You'll need to register ahead of time on RunSignup since on-site registration isn't available, and arrive early for packet pickup, which runs from 30 minutes before the start until 10 minutes before the gun goes off. The 5K and 10K share a 1.56-mile out-and-back loop (with the 5K completing it once and the 10K twice), while the half marathon uses a separate 1.64-mile out-and-back loop four times, and all distances must be finished within 3 hours and 30 minutes.