Stretching more than 800 miles from Mexico to Utah, the Arizona Trail is one of the most ambitious long-distance trails in the United States. The route crosses deserts, mountain ranges, canyons, forests, and grasslands while traversing the entire length of Arizona from south to north.
Along the way, hikers experience an extraordinary variety of landscapes. Few places showcase that diversity quite like the stretch of trail that winds through the Santa Catalina Mountains and the high-elevation forests surrounding Mount Lemmon.
In a relatively short distance, the trail climbs thousands of feet in elevation, carrying hikers from cactus-studded Sonoran Desert into cool pine forests high above Tucson. This dramatic ecological transition is part of what makes the Mount Lemmon section of the Arizona Trail one of the most memorable hiking experiences in southern Arizona.
For visitors exploring the mountain village of Summerhaven, this portion of the Arizona Trail offers access to some of the most scenic hikes in the region.
Where the Arizona Trail Crosses Mount Lemmon
The Mount Lemmon section of the Arizona Trail runs through Passage 11 in the Santa Catalina Mountains, just north of Tucson. This segment climbs thousands of feet in elevation, transitioning from Sonoran Desert landscapes into cool pine forests near the upper elevations of Mount Lemmon. Because of its dramatic scenery and cooler temperatures, it is one of the most popular sections of the Arizona Trail for day hikers and backpackers.
The Story Behind the Arizona Trail
The Arizona Trail began as a vision from Arizona schoolteacher and backpacker Dale Shewalter, who imagined a continuous non-motorized trail stretching from Mexico to Utah.
Throughout the 1980s and 1990s, volunteers, trail builders, and land managers worked to connect existing trails and construct new ones across the state. Their efforts culminated in 2009 when the route was officially designated as the Arizona National Scenic Trail.
Today the Arizona Trail spans more than 800 miles and is divided into 43 segments known as “passages.” While a small group of hikers attempt to complete the entire trail each year, many outdoor enthusiasts explore it one section at a time.
The Santa Catalina Mountains passage—particularly the Mount Lemmon area—is widely considered one of the most scenic portions of the entire trail.
Passage 11: Santa Catalina Mountains
The section of the Arizona Trail that crosses Mount Lemmon is officially known as Passage 11: Santa Catalina Mountains. It is also one of the most physically demanding stretches of the entire route.
Beginning in the desert foothills north of Tucson, the trail climbs steadily into the heart of the Catalina Mountains. Along the way, hikers gain thousands of feet in elevation while moving through several ecological zones.
At lower elevations, the terrain is classic Sonoran Desert, filled with towering saguaros, ocotillo, and prickly pear cactus. As the trail climbs higher, desert vegetation gradually gives way to oak woodland and juniper.
Eventually the landscape transforms entirely. By the time hikers reach the upper elevations surrounding Mount Lemmon, the trail passes through dense stands of ponderosa pine, cooler temperatures, and sweeping mountain views.
This dramatic transition—from desert floor to alpine forest—is one of the defining characteristics of Passage 11 and one of the reasons it remains a favorite among Arizona hikers.
Best Day Hikes Near the Arizona Trail on Mount Lemmon
Visitors don’t need to attempt the entire Arizona Trail to experience the beauty of the Catalina Mountains. Several trails near Mount Lemmon provide access to scenic portions of Passage 11 and connecting routes.
Marshall Gulch Loop
Distance: ~4 miles
Difficulty: Moderate
One of the most popular hikes near Mount Lemmon, the Marshall Gulch area sits among tall pine trees near the upper elevations of the Catalina Mountains. The loop trail winds through shaded forest and connects with several nearby trails that intersect with the Arizona Trail corridor.
In spring and early summer, snowmelt feeds small seasonal streams that add to the charm of this scenic mountain landscape.
Aspen Trail
Distance: ~5 miles round trip
Difficulty: Moderate
The Aspen Trail offers a peaceful forest hike beneath towering pines. The terrain here feels worlds away from the desert below, with cooler temperatures and quiet mountain scenery.
This trail also connects with nearby routes that intersect with sections of the Arizona Trail in the Catalina Mountains.
Oracle Ridge Trail
Distance: varies depending on route
Difficulty: Strenuous
Oracle Ridge is one of the most challenging hikes in the Santa Catalina Mountains and closely follows the path of Passage 11 for part of its route. The trail climbs steeply from the desert foothills, offering dramatic views across southern Arizona.
For experienced hikers looking for a challenge, Oracle Ridge provides one of the most rewarding—and demanding—routes in the region.
Butterfly Trail
Distance: ~5 miles
Difficulty: Moderate
The Butterfly Trail offers beautiful forest hiking with scenic overlooks along the Catalina Mountains. Sections of the trail connect with other routes that intersect with the Arizona Trail network near Mount Lemmon.
When to Hike the Arizona Trail on Mount Lemmon
The Mount Lemmon section of the Arizona Trail offers excellent hiking conditions throughout much of the year.
Spring
Wildflowers begin appearing along the lower slopes while melting snow feeds seasonal creeks and small waterfalls.
Summer
Temperatures on Mount Lemmon can be 20–30 degrees cooler than Tucson, making it a popular escape from desert heat.
Fall
Crisp mountain air and changing foliage create some of the most beautiful hiking conditions of the year.
Winter
Snow occasionally blankets the higher elevations, transforming the mountain landscape into something entirely different from the desert below.
Using Mount Lemmon Lodge as Your Arizona Trail Basecamp
One of the advantages of exploring the Mount Lemmon section of the Arizona Trail is that many trailheads are clustered near the mountain community of Summerhaven. That makes it easy for hikers to spend a few days on the mountain and explore multiple sections of Passage 11 without constantly driving up and down the Catalina Highway.
Several popular hikes that intersect with or connect to the Arizona Trail—including Marshall Gulch, Aspen Trail, and Butterfly Trail—are all located within a short drive of Summerhaven. This allows hikers to experience different parts of the Catalina Mountains while returning to the same base each evening.
For visitors planning a hiking getaway, Mount Lemmon Lodge offers a convenient and comfortable basecamp right in the heart of the village. The lodge sits within walking distance of local restaurants and shops, and many trailheads are only minutes away.
After a full day exploring the Arizona Trail, returning to the cool mountain air of Mount Lemmon, rather than descending back to the desert, can be one of the most rewarding parts of the experience.
For hikers who want to explore multiple sections of Passage 11, spending a few nights on the mountain makes it possible to fully experience the unique transition from desert landscapes to high-elevation pine forest that defines the Catalina Mountains.
A Trail That Shows the True Diversity of Arizona
Few places illustrate Arizona’s geographic diversity better than the Arizona Trail section that crosses the Santa Catalina Mountains.
In the span of a single hike, travelers can move from cactus-covered desert into cool mountain forest while experiencing some of the most striking landscapes in the American Southwest.
Whether you’re exploring a short day hike near Mount Lemmon or tackling a longer stretch of the Arizona Trail, Passage 11 offers an unforgettable look at the landscapes that make Arizona one of the country’s most compelling hiking destinations.
