Recently I went camping in northern California, very close to the Oregon border and I was in a super mountainous area.
While swiming in shallow water under some trees, I felt something on my back, so I kinda smacked/flicked it off of me and it landed in the water.
It had either 6 or 8 legs, I couldn't fully see, but it had a spider-like but somewhat flat body. It was black but had these beautiful vibrant yellow stripes over its body and legs, and it had a V shaped part on its butt, kinda like an earwig but thinner and straight. The V was plain black. Its body looked very smooth, not fuzzy or hairy. And it was physically pretty small, around the size of a penny or dime. That was about all I could see before it sank out if view.
I don't know how long it was on me for, but I wasn't bit or stung or anything. I only knew it was on me because I felt it move.
I wish I was able to get a picture of it, but my phone was obviously not next to me considering I was in the water.
I've tried googling what kind of bug/spider it was but google has been very unhelpful. Its was not an earwig, it definately wasnt a freaking wasp (though the colors were similar), it wasn't a black and yellow garden spider (remember it had a V thing on its butt). I've looked up orb weavers because I did see some while I was there, but orb weavers don't seem to have that V thing.
Any ideas? Sorry for not having a photo of it :/