Stock, Douglas Spring, Three Tank, and Wildhorse Loop

The trailhead for the Stock, Douglas Spring, Three Tank, and Wildhorse Loop is located at the Douglas Spring Trailhead, which is at the end of Speedway Boulevard near Tucson, Arizona. Parking is available at this location. While the parking area itself may not require a fee, much of the hike is within a fee area of Saguaro National Park, so carrying a US Forest Service pass (like a Golden Age Pass) is recommended.

The best time to hike this loop is between November and March. This period avoids the extreme heat of the Sonoran Desert, making for a much more comfortable and safer experience. During these cooler months, you might also catch wildflowers after sufficient rains.

No, dogs are generally not allowed on unpaved trails within Saguaro National Park, which includes this loop. This regulation helps protect the park's fragile ecosystem and wildlife.

While there might not be a specific permit for this trail, much of the loop is located within Saguaro National Park, which is a fee area. You will likely need to pay the park entrance fee or have a valid pass (such as a US Forest Service pass or America the Beautiful pass) to access the area. Check the official Saguaro National Park website for current fee information.

The terrain on this moderate loop is varied. You can expect rocky paths, switchbacks, and some sandy stretches, especially early on. Much of the trail consists of rolling, smooth singletrack, with flat, grassy, and bushy areas. There are also several dry wash crossings and sections with light grey slickrock. The Douglas Spring Trail segment involves an ascent, but it is not overly technical.

This loop showcases the stunning Sonoran Desert landscape. You'll see towering saguaros, diverse cacti, and vibrant wildflowers, especially after rains. The trail offers panoramic views of the surrounding Rincon and Catalina Mountains, as well as the city of Tucson. A notable highlight is the Giant Saguaro Cactus in Saguaro Wilderness. You'll also pass by a string of water tanks, including the remains of Aguilla Tank, Mica Tank, and Red Steel Tank, and the site of the Garwood Dam and Ranch House. If water is flowing, a detour to Bridal Wreath Falls is possible.

The Sonoran Desert is home to diverse wildlife. Hikers have opportunities to spot animals such as deer. Be aware that rattlesnakes are present in the area and can be hard to spot in overgrown grass, so always be vigilant.

Due to the desert environment, there is very little shade along the entire trail. It is crucial to carry ample water, especially outside of the cooler months. There are no reliable water sources directly on the trail, so plan to bring all the water you will need for the duration of your hike.

Yes, this loop utilizes several established trails within the Saguaro National Park system. The route incorporates sections of the Douglas Spring Trail, Carrillo Trail, Three Tank Trail, Garwood Trail, and Wildhorse Trail, offering a comprehensive tour of the area.

This loop is rated as moderate. While it offers varied terrain and some ascents, it's generally manageable for hikers with some experience. For beginners or families with young children, the distance and lack of shade might be challenging, especially in warmer months. Consider shorter sections or cooler times of the year if hiking with less experienced individuals.

To avoid the worst of the heat and potential crowds, aim to hike between November and March, and consider starting early in the morning. Be aware that some sections of the trail can be sandy. Always carry plenty of water due to the lack of shade, and keep an eye out for rattlesnakes, especially in overgrown areas.