The underwater park at Keystone Jetty is found just South of the Keystone Ferry terminal in the Fort Casey State Park.  A small parking area with picnic tables and facilities makes for a nice two-tank location.

About 30 miles North of Seattle on Whidbey Island.  The location makes for a great loop drive for a leisurely day.  The North access to the island is via Anacortes, and the South access is via the Mukilteo Ferry, just West of Everett.  About in the middle of the Island, just South of Coupeville, head West on Wanamaker road (highway 20) to the Keystone Ferry landing.

Keystone Jetty (Fort Casey)

Been at least a dozen times.  I just did two dives there last weekend, and I always enjoy it.  Pay attention to slack times as the current can be a bear.  I usually go a little heavy on weight so I can bottom-crawl if needed, especially when diving the pilings.  Depth at the end of the jetty is roughly 55' and viz varies from 10' to 30'.  If you stay between 20' and 40' it makes a neat wall dive.

Mike Snow's Dive Log

@mike_snow

1 dives