World Dog Surfing Championship I'm Hangin' 10 ... And the Surf is Ruff

8/5/2018 7:32 AM PDT

World Dog Surfing Championships Goes Down Near San Francisco

Derby the dog showed how it's done Saturday at the Dog Surfing Championship at Linda Mar Beach in Pacifica, California.

Derby was decked out in shades and a life vest as he shot the curl. The waves were only moderately gnarly, but hey ... they're dogs so it's super impressive.

Check out the photo gallery ... a lab, a golden retriever, a pug, a terrier and garden variety mutts tried their paws at hanging 10.

There were different weight classes -- small, medium, large and very large. And get this ... there was even a tandem dog competition. One clearly rode bitch. And there was a human/dog pairing, too.

It was all for a good cause ... proceeds from the event go to dog-related charities. The sponsors include Banfield Pet Hospital, Camp Bow Wow, WAG Hotels, Pet Food Express, Woodrow Wear and Hanks Dog Stuff.