WHERE: All over Seattle. Get your sneakers on.

WHAT: The folks at E. E. Robbins, in tandem with the Google-backed mobile gaming company Scvngr present the third annual Amazing Ring Race. Like other scavenger hunts, this one involves clues and smart phones, and the good old fashioned competitive spirit, but this one concludes a very serious prize.

The couple that does the best job of sleuthing out the engagement ring store's challenges will win the chance to score a $15,000 MaeVona Passion Cut diamond ring.

To sign up, couples are encouraged to submit their love story at amazingringrace.com. To get your eyes on the prize, head to E. E. Robbins downtown, where the ring is on display and details about the contest are all laid out.

WHEN: Saturday, August 25