Bill Reily to San Gabriel, Lowe, and Muir Peak

Bill Reily to San Gabriel, Lowe, and Muir Peak is an 11-mile out-and-back route, perfect for peak-bagging enthusiasts craving a challenging day in the San Gabriel Mountains. With steep climbs and a total elevation gain of 3,634 feet, this route provides a rewarding mix of shaded sections, exposed ridges, and historical remnants. Hikers can tackle all three peaks or adjust their journey to suit their goals, making this route both exciting and flexible.

This trail is a rewarding adventure for those looking to experience the beauty and solitude of the San Gabriels while challenging themselves with a steady climb to a few picturesque peaks.

ROUTE DESCRIPTION

Start at the Bill Reily Trailhead, located northeast of Altadena, just past the Red Box Picnic Area off Mount Wilson-Red Box Road. The trail begins with a steady climb through shaded forest, providing peaceful moments and occasional glimpses of the ridgelines above. Follow the trail to the junction with the San Gabriel Peak Trail, where you’ll complete a short but steep out-and-back hike to the summit of San Gabriel Peak before continuing toward Markham Saddle.

From Markham Saddle, head west to join the Mount Lowe Trail, leading to your second summit. Descend via Mount Lowe East Trail (though Mount Lowe West Trail also connects to the same destination). Continue along the dirt road path to Inspiration Point, then onward to the top of your third peak, Muir Peak. Along the way, enjoy expansive views of the surrounding wilderness, the Los Angeles Basin to the west, and, on clear days, Catalina Island and the Pacific Ocean in the distance.

At Muir Peak, take time to appreciate the panoramic views and explore the serene environment before retracing your steps back to the start.

HIGHLIGHTS

• Muir Peak: A secluded summit with breathtaking views.

• Trail Variety: A mix of shaded and exposed sections with a blend of gentle climbs and steep switchbacks.

• Flora and Fauna: Keep an eye out for native plants and wildlife typical of the San Gabriel Mountains.

• History: Portions of the route, particularly Upper Sam Merrill Trail, pass areas rich with the history of early mountaineering and local lore.

SAFETY AND CONSIDERATIONS

• Difficulty: Moderate to strenuous, best for hikers with some experience.

• Navigation: The trail is well-marked but bring a map or GPS for unfamiliar junctions.

• Season: Best hiked in cooler months, as portions of the trail are exposed.

Essentials: Carry plenty of water, snacks, and sun protection.