Secret Treasures of Alaska's Dangerous Mudflats

Secret Treasures of Alaska's Dangerous Mudflats

Join us as we venture out into the dangerous mud flats of Alaska’s Cook Inlet as we search for mineral concretions, locally known as Spirit stones.

The Cook Inlet mudflats have been the scene of a few well-known incidents in Alaska’s history. From helicopter’s attempting to pull people out via rope, to a newly wed gold miner who drowned as the tide came in, these true events have gained urban legend status locally. Due to the angular grains of glacial silt, the mud behaves like quicksand. This means once disturbed, say by someone sinking in it, the grains quickly interlock and trap the unsuspecting. Few deaths have happened in recent years thanks to specialized equipment used by rescuers, including portable pumps to wash away mud. Tidal channels, like those at the Turnagain and Knik arms, are the most dangerous with mud layered feet deep. When timed correctly between high tides there are many people cross regularly to Fire Island from Anchorage.

The mud in our area tends not to be deeper than a few inches to a foot. Just deep enough to trap vehicle tires and lose boots in, but not deep enough to get unmanageably stuck. Our area also has plenty of large rock deposits to use as walkways for those willing to risk getting a little dirty while they search for agates and spirit stones. There are many hours between high tides to spend exploring these dangerous but beautiful areas.

Disclaimer: I do not suggest people travel in the mudflats, especially without a local guide. Proper knowledge of location, tide tables, bore tides, water temperature and emergency services are necessary in the event of someone becoming stuck.

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