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Bonneville Seabase

Bonneville Seabase

In the deserts of western Utah, there are secrets beyond imagination.

Bonneville Seabase is one of those secrets.  Located 40 miles west of Salt Lake City on the outskirts of Granstville, there is a natural phenomenon where spring water rising through the ancient lake bed of Bonneville becomes almost 3% saltwater. At the salinity of the ocean, the water wells up as warm springs, and with the addition of ocean fish, an inland ocean was formed for SCUBA and snorkeling.

Scuba divers and snorkelers are welcomed to come and explore the depths. With a little patience, you will see what lies beneath the surface of our little inland sea.


Bonneville Seabase

9390 West Highway 138, Grantsville, UT 84029


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We are open Thursdays, Fridays from 9:am- 4:pm, Saturdays and Sundays 8:am-4:pm. If your arrival time is after 2:pm give us a call beforehand. Staff leaves at 2:pm if no one is here. Reservations highly advised. (Mondays-Wednesdays available by appointment only.) Make a reservation here:


This venue available for rent: No

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