Mt. Lamlam: Guam's Highest Peak

Hike Guam's highest point for breathtaking views and a unique geological claim as the world's tallest mountain from the Mariana Trench.

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Mount Lamlam
Mt. Lamlam Actual Peak

Ascend Mt. Lamlam, Guam's highest point, for panoramic views and a unique claim to fame as potentially the world's tallest mountain when measured from its base in the Mariana Trench. The moderate hike offers stunning vistas and a connection to the island's rich cultural history.

A brief summary to Mt. Lamlam Actual Peak

8MQ8+V7J, Hågat, GU

Local tips

Hike during the dry season (December to April) for more comfortable temperatures and less chance of slippery trails.
Bring plenty of water, sunscreen, and snacks, as there is little shade on the trail.
Wear sturdy hiking shoes, as the trail can be steep and rocky in sections.
Consider wearing long pants to avoid scrapes from the sword grass along the trail.
Take your time and enjoy the panoramic views along the way.

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Getting There

Driving

From Tumon Bay, drive south on Marine Corps Drive (Route 1). Turn left onto Route 2A, then continue onto Route 2. Drive through Agat and continue for approximately 3 miles. Look for a red wall on the right side of the road. The trailhead is across the street on the left. Parking is free. If you reach Umatac, you've gone too far.
Public Transport

Take the Guam Public Transit bus (Route 1) southbound. Disembark at the nearest stop to the Mt. Lamlam trailhead on Route 1. From there, it's about a 30-minute walk to the trailhead. Alternatively, arrange for a taxi or rideshare service to cover the remaining distance to Mt. Lamlam, which is about a 5-minute drive from the bus stop. Bus fare is $1-3.

Discover more about Mt. Lamlam Actual Peak

Mt. Lamlam, meaning "lightning" in the Chamorro language, is Guam's highest peak, rising 406 meters (1,332 feet) above sea level. Located near Agat in southwestern Guam, it offers more than just a hike; it's a journey through the island's volcanic origins and Chamorro heritage. What makes Mt. Lamlam truly unique is its connection to the Mariana Trench, the deepest part of the ocean. Measured from its base there, Mt. Lamlam could be considered the world's tallest mountain. The challenging but rewarding hike to the summit leads through diverse terrain, from dense jungle to breezy savannahs. At the summit, breathtaking 360° views await, showcasing Guam's southern mountains, rugged coastlines, and the vast Pacific Ocean. You might even spot Cocos Island and the Northern Mariana Islands in the distance. Along the trail, discover small white crosses marking the Stations of the Cross, a testament to the island's deep Catholic faith interwoven with indigenous traditions. This tradition is especially significant during the annual Easter pilgrimage.