Yesterday I took my phantom 3 out for a cruise down at one of the areas I like to fly, Golden Gardens on Puget Sound in the Seattle area. I like this area because I can do some speck in the sky flying without cruising over people, cars, houses, ect. At the north end of the park there's an oval grassy spot that I launch from and then proceed to the north along the shore and from there back south just offshore then east a little bit then back north. As I was coming northbound (over the grassy area) from the southbound leg, a small aircraft (Cessna?) came around the corner from the north, from behind the ridge, along the shoreline, I would guess somewhere in the neighborhood of 100 or so off the water, probably gawking at the babes on the beach, anyhow I usually fly at around 150 feet. I can easily see a situation where our course lines could have intersected. Freaked me the hell out! I suppose i'll cross this spot off my list.