if it is a wild area i would look up native riverside bulb spring flowering plants, if it isn't it could be anything that someone planted... can't really tell from the picture with my eyes, would need a closer up picture.
I should take a walk where I know that they show up on creek-side here. Imagine that at 2,000 feet higher elevation than your Salish Sea and hundreds of miles through the mountains and Columbia Basin and more mountains, I am wondering about flowering snowdrops here!