Notes and photos submitted by Sandy Bowman, Seattle.
Several erratics dot the cobbly northern beaches of Seattle’s Discovery Park, the site of the former Fort Lawton and just south of Shilshole in Seattle. One Panoramio photo shows a collection of these erratics. (Panoramio is the website that shows all those photo icons on Google Earth.) Click to go to the Panoramio photo. There are several other photos on Google Earth showing offshore rocks on the beach at the foot of the trail.
The largest of these erratics (47° 40.124’N, 122° 25.210’W) is ~150 yards northeast of where the North Beach Trail joins the Beach Trail in Discovery Park. Sandy Bowman and her friend Consuelo Larrabee were able to walk out to examine it at a -1.7 foot tide, which appears to be plenty low enough for a visit. Judging from barnacles in Sandy’s photos, this rock is about 50% submerged at highest tides. The rock is a smooth, tan rock with glacial striae, especially evident on the water side. If anyone visits this rock, take a stab at identification, or send in some good close up photos showing features. It appears to be rather fine grained. From the solution pockets and color, it might be Chuckanut Formation or another sandstone. Using a tape measure, Sandy and Consuelo determined that the erratic is 15’4″ high. The circumference is 69.5 ft. You may find a knotted rope hanging down the rock- it is attached to a heavy duty pin with an eye (piton?) but I’d be very leery about trusting any rope that someone else left who knows how long ago.
Sandy reports that a smaller erratic, covered with algae, barnacles and other marine life lies 130 yards to the north-east. Too much biota to actually get a good view of the boulder’s surface to identify the rock. This one is out of the water at a -2.4 tide. Our intrepid duo of erratic hunters found that This erratic is 49 ft. around and 8’2″ high.
There is a smallish rock 100 yards north-west of the big one, but it has always got water around the base. Not to be defeated by mere seawater, Sandy and Consuelo asked a party of standup surfboard paddlers who were passing to please measure the height of this rock, and one fellow agreed to do it. Using the measuring tape he determined that it was 59″ high and sitting in only 2″ of water. Sandy told me she found this quite hilarious as she had hoped to recruit a kayaker for the job. If you are out there, thanks to the paddler for graciously cooperating.
Finally, another nice erratic, this one granitic, is very near where the North Beach Trail meets the shore at Discovery Park.