Mount Lamlam: Guam's Highest Peak

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Hike Guam's highest peak for stunning panoramic views and a unique claim to fame as the 'World's Tallest Mountain'.

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Mount Lamlam Summit

Hike to the summit of Mount Lamlam, Guam's highest point, for panoramic views and a unique geological perspective. This moderately challenging trail offers a rewarding experience for nature enthusiasts and those seeking breathtaking vistas of the island and the Pacific Ocean.

A brief summary to Mount Lamlam Summit

8MQ8+5JW, Mount Lamlam Summit, Humåtak, GU

Monday 12 am-12 am
Tuesday 12 am-12 am
Wednesday 12 am-12 am
Thursday 12 am-12 am
Friday 12 am-12 am
Saturday 12 am-12 am
Sunday 12 am-12 am

Local tips

Start your hike early in the morning to avoid the midday heat and humidity.
Bring plenty of water and snacks to stay hydrated and energized during the hike.
Wear sturdy hiking shoes, as the terrain can be rocky and uneven.
Consider wearing long pants to protect your legs from sword grass along the trail.

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Getting There

Driving

From Antonio B. Won Pat International Airport (GUM), head south on Route 1 (Marine Corps Drive). Continue to follow Route 1 until you reach Route 2 in Agat. Follow Route 2 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 available near the Cetti Bay Overlook. There are no tolls or parking fees.
Public Transport

From Hagåtña, take the bus towards Agat. Inform the driver you wish to get off at the stop for Mount Lamlam. The bus ride takes approximately 20-30 minutes. From the bus stop, follow the signs towards the Mount Lamlam trailhead. As of July 2025, a one-way bus fare is approximately $4. The bus schedules can be infrequent, so plan accordingly.

Discover more about Mount Lamlam Summit

Mount Lamlam, meaning "lightning" in the Chamorro language, is the highest peak on the island of Guam, rising to 1,332 feet (406 meters). While modest in height compared to other mountains, it holds a unique distinction: measured from its base in the nearby Mariana Trench, the deepest part of the ocean, it represents the greatest change in elevation over a short distance on Earth. This geological quirk has led locals to playfully call it the "World's Tallest Mountain". The hike to the summit offers a rewarding experience, with trails winding through lush tropical vegetation. Along the way, hikers are treated to picturesque viewpoints that reveal the sparkling blue waters of the Pacific Ocean. The panoramic vistas from the summit are awe-inspiring, encompassing both the northern and southern parts of the island. On a clear day, you might even catch a glimpse of neighboring islands on the horizon. Mount Lamlam also holds cultural significance for the Chamorro people, the indigenous inhabitants of Guam. The mountain is considered a sacred place, a bridge between the physical and spiritual worlds. Each year, local Catholics participate in a tradition of carrying large crosses to a secondary peak near Mount Lamlam during Easter weekend.