Monterey Canyon is one of the Pacific coast's most dramatic underwater features, drawing scientists, divers, and wildlife watchers to California's central coast.
Monterey Canyon is a submarine canyon of remarkable scale, stretching roughly 95 miles across the floor of the Pacific and reaching depths approaching 11,800 feet. Its head begins just off Moss Landing in the heart of Monterey Bay, making it one of the few canyons of its size that starts so close to shore. Geologists believe it formed over millions of years through a combination of erosion and tectonic activity, and its walls reveal layer upon layer of ancient sediment.
The canyon drives the ecological richness of the entire region. Cold, deep water rises along its flanks in a process called upwelling, delivering nutrients that feed dense blooms of phytoplankton. This abundance ripples up the food chain, supporting anchovies, salmon, sea otters, and the largest animals on the planet. Researchers from the Monterey Bay Aquarium Research Institute have used remotely operated vehicles to document extraordinary deep-sea life here, from bioluminescent jellies to rarely seen squid.
For visitors, the canyon is best experienced from the water. Whale watching trips departing from nearby Moss Landing Harbor District regularly encounter humpbacks, blue whales, and orcas feeding directly above the canyon's head. Pelagic birding trips attract enthusiasts hoping to spot shearwaters, albatross, and storm-petrels far offshore.
Few natural features anywhere on the California coast concentrate so much wild, visible life in one accessible location, making Monterey Canyon a destination that rewards every curious traveler who ventures out onto the water.
Visit between April and November for the best whale-watching conditions, when upwelling brings abundant krill and baitfish to the surface above the canyon.
Book a whale-watching or pelagic wildlife cruise departing from Moss Landing for the closest surface access to the canyon's head.
Bring binoculars and layers of warm clothing, as sea temperatures and winds above deep water can be significantly colder than onshore.
Look for Risso's dolphins, Pacific white-sided dolphins, and ocean sunfish, all of which are regularly spotted in the waters over the canyon.
Time a visit to coincide with a new or full moon, when tidal currents encourage deeper marine life to rise closer to the surface.
Cruise Monterey Bay by fast raft with a naturalist guide
Spend 6–8 hours spotting more marine wildlife from a low-to-the-water open boat
Cruise Monterey Bay to spot whales and dolphins with onboard marine biologists