Cetti Bay, Mount Lamlam Travel Guide

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Discover Cetti Bay in Guam: A blend of ancient history, stunning landscapes, and outdoor adventures await in this culturally rich destination.

Cetti Bay is a historic site and oceanic bay near Umatac, Guam, offering a blend of natural beauty and cultural significance. Part of Guam's Territorial Seashore Park, it features volcanic rock formations, lush greenery, and remnants of ancient Chamorro settlements.

A brief summary to Cetti Bay

8M84+CXH, Humåtak, GU

From Eve

Know before you go

Hi, I'm Eve. Here are a few practical things to know before exploring Cetti Bay.

Wear comfortable shoes for exploring the rugged terrain and bring swimwear for snorkeling in the bay.
Check the tide conditions before hiking, especially between Fouha Bay and Cetti, as a narrow reef can only be crossed at low tide.
Bring your camera to capture the stunning views of the bay, volcanic rock formations, and surrounding landscape.
Visit early in the morning or late afternoon for the best lighting for photography and a tranquil experience.

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Explore Cetti Bay on the Map

A handpicked selection of must-see spots near Cetti Bay, mapped for you.

Getting There

Driving

From Umatac Bay, drive southwest on Route 4 towards Humåtak. Continue for approximately 6 miles (10 minutes) and watch for the Cetti Bay Overlook sign. Turn left onto the unpaved road leading to the overlook. There is no parking fee. Ensure your vehicle can handle the road conditions.
Public Transportation

Take a bus from Umatac Bay to the nearest stop on Route 4. Transfer to a local taxi service, as public transport does not directly reach Cetti Bay Overlook. A taxi ride from the bus stop to Cetti Bay Overlook will cost approximately $10-$15. Confirm the fare with the driver before starting your journey. Note that public transportation schedules can be unpredictable.

Discover more about Cetti Bay

Cetti Bay, nestled near Umatac on Guam's southern coast, is a captivating destination where history and nature intertwine. This scenic bay, part of Guam's Territorial Seashore Park, has been inhabited for approximately 3,000 years, with evidence of ancient Chamorro settlements found in latte stones and pottery shards. The bay is also known as Atte in ancient times, where it sided with rebel Chamorros during the Chamorro Spanish Wars.The area's unique geological formations, including the pillow lava of Attelong Acho (Black Rock), reveal Guam's volcanic origins. The Spanish later created a road system through Cetti Bay, connecting Hagåtña with Humåtak. Today, Cetti Bay is listed on both the Guam and National Registers of Historic Places.Visitors can explore the bay's rocky south side and sandy north side, surrounded by grassland, coconut trees, and a ravine forest that conceals Cetti Falls. The bay is ideal for fishing, snorkeling, and discovering seashells. Hiking trails offer breathtaking views, though accessing the bay by foot can be challenging, often requiring a hike from Humåtak or Sella Bay. Alternatively, reaching Cetti Bay by boat when the waters are calm is a popular option.While exploring, keep an eye out for the ancient Chamorro village of Jati near the north shore, where two latte structures and remnants of pottery can be found. US Navy archeologist Douglas Osborne documented the island’s archeological sites in 1947 and was mystified by Cetti, noting a large "taza", a latte cap made of fine coralline limestone.