The 13th Annual Tri-Cities Geocoin Challenge kicks off today. It runs Thursday through Sunday with the geocaching MEGA event on Saturday.

Geocoins are special coins that geocachers collect as part of a modern-day treasure hunt.

Jen Davis, Parks and Recreation Coordinator, says passports are given out to participants.

"In each of those passports, you will find different locations to brand new geocaches, traditional caches and adventure labs."

Saturday’s geocaching MEGA event, which attracts hundreds of participants from around the U.S. and beyond, will be headquartered in John Dam Plaza, 815 George Washington Way.

It's a free, family-friendly event with a Kid/Teen and an Adult Challenge. Adults who complete the challenge earn a collective Geocoin and kids/teens earn a Cachekinz trackable similar to the event coin.

You can still participate by going to this link. There are still plenty of spots available.

To Receive your Coin

One family member (only) MUST register through Richland Parks and Recreation.

Adults ~ Complete the Adult Passport

Kids/Teens ~ Complete the Kid/Teen Passport