5 /5 Andrey Solovyev: The trail itself is not difficult, with nice views of the city, mountains, and yuccas, but the highlight is of course the old tin mines. The end of the AllTrail route is not the entrance to the mines. As you climb the mountain, you will pass metal grates on the left. The first entrance is behind the bottom (left) grate. Once you get under the grate, you will see the metal railings and the entrance to the tunnel. To find the second entrance, follow the wooden steps in the ground down the slope and soon you will come to a small door. You have to crawl to get inside, but the tunnels themselves are quite high. At 5 ft 9 in, my brother was able to stand and walk freely most of the time. There were no truly claustrophobic sections. The tunnels are dark, dusty, and have sharp rocks on the floor, so bring flashlights or headlamps and sturdy boots. The tunnels aren’t very long, and while there are a few forks, it’s not a maze in which one can get lost. It took us a total of 3 hours to get there, explore the mines, and return back to the car. On a weekday morning in May, we encountered only one mountain biker. We paid the fee ($5 per person) in cash using an envelope at the trailhead at Chuck Heinrich Memorial Park, but we could have paid it online and written the reservation number on a permit.