Alta Loma Trailhead to Grass Shack Camp Trail

The trail begins at the Alta Loma Trailhead, located in the east unit of Saguaro National Park near Tucson, Arizona. Parking is available at the trailhead. Arriving early, especially during peak seasons, is recommended to secure a spot.

The full hike from Alta Loma Trailhead to Grass Shack Camp is approximately 15.5 kilometers (9.6 miles) and typically takes around 4 hours and 48 minutes to complete as a one-way trip, not including time spent at the camp. This duration can vary based on your pace and breaks.

This trail is rated as 'moderate' due to significant elevation changes, including an ascent of around 790 meters (2,600 feet) to Grass Shack Camp. While the initial sections might be gentler, the overall journey is demanding and better suited for hikers with some experience. It may not be ideal for beginners or very young children.

The terrain varies significantly. You'll start with relatively gentle inclines through a saguaro forest on dirt and gravel paths. As you ascend, the path becomes more demanding, with winding sections over rocks and occasional small pools of water. The vegetation also transitions from desert flora to a more mountainous environment with pine trees closer to Grass Shack Camp.

You'll experience evolving scenery, starting with a dense saguaro forest where you can spot diverse cacti like the Arizona rainbow cactus. As you climb, you'll get expansive views of the Rincon Mountains and the Tucson Valley. The trail also features Giant Saguaros, and you might encounter historical landmarks like an old windmill and water tank. Grass Shack Campground itself is often characterized by a flowing stream and shaded areas.

Yes, sections of this route are part of the longer Arizona Trail. You may also find it intersecting with the Sky Islands Traverse, Quilter Trail/Arizona Trail, and Manning Camp Trail/Arizona Trail, meaning you might encounter long-distance thru-hikers.

No, dogs are generally not permitted on backcountry trails within Saguaro National Park, including the route to Grass Shack Camp. Always check the latest regulations with the National Park Service before planning your hike.

The best time to hike is typically during the cooler months, from late fall through spring (October to April), to avoid the extreme heat of the Arizona summer. Springtime can also offer phenomenal blossoms on various cactus species. Be prepared for varying weather conditions as you gain elevation.

Yes, Saguaro National Park has an entrance fee. Additionally, if you plan to stay overnight at Grass Shack Campground, which is a designated backcountry campsite, you will need a permit from the National Park Service. It's crucial to obtain this permit in advance as spots are limited.

While Grass Shack Camp itself is often characterized by a stream, water availability on the trail can be seasonal and unreliable, especially in the desert environment. It is crucial to carry all the water you will need for the entire hike, as well as purification methods if you plan to rely on natural sources at the camp.

Given the trail's length, elevation gain, and desert environment, you should pack plenty of water, sun protection (hat, sunscreen), sturdy hiking boots, layers of clothing for changing temperatures, a map and compass or GPS device, snacks, and a first-aid kit. If staying overnight, bring appropriate camping gear and a backcountry permit.