The Crickhowell Walking Festival is holding 2 geocaching events as part of its program. The first on Saturday the 28th of February is a race to collect stamps from 6 new caches in the area. The quickest to collect all 6 wins a prize. Entry costs £3. No booking necessary, just come to the Crickhowell information centre CRiC from 10 am.
The second event is a week later on Saturday the 7th of March and is an introduction to geocaching using easier caches. There will be some GPS units provided for you to borrow. Come to the CRiC from 10am. No booking necessary.

You can find more information at http://www.crickhowellfestival.com/2009/site/.