The Cascade Orienteering Club will host a day of orienteering at Putney Woods on Saturday, Dec. 17.

Explore Putney Woods by searching for checkpoints marked on a map; race against the clock or take an easy stroll. Participants can start any time between 10 a.m. and noon.

No orienteering experience is necessary, and free instruction is available. The cost is $8-$11; visit www.CascadeOC.org, email terry.farrah@gmail.com or call 206-913-3790, for more information.