In 1900, Thomas McInery began to acquire land south of Pima to sell shares in a scheme to find both gold and enough water to irrigate all of the Gila Valley. He promoted this tunnel (also called the Mammouth Tunnel and Triumph Tunnel) in a fraudulent money-making scheme before abandoning the project and leaving town. The 250-foot start still remains, dug ten feet high and eight feet wide into solid rock and accessible to exploration.
Check out the Triplog.
This hike is listed as One-Way.
When hiking several trails on a single "hike", log it with a generic name that describes the hike. Then link the trails traveled, check out the example.
WARNING! Hiking and outdoor related sports can be dangerous. Be responsible and prepare for the trip. Study the area you are entering and plan accordingly. Dress for the current and unexpected weather changes. Take plenty of water. Never go alone. Make an itinerary with your plan(s), route(s), destination(s) and expected return time. Give your itinerary to trusted family and/or friends.