American River 10th Annual TrailFest June 9th

http://www.arconservancy.org/site/c.psKZL3PFLrF/b.8664113/k.5FAD/TrailFest_2013.htm

This looks like a fun family friendly event supporting local trails! Kid's activities include;

Concert, yoga, face painting, science table, craft table, & storytellers!  
Starts at 3pm click link above for ticket information.

And earlier in the day Motherlode Outdoor center celebrates Get Outdoors Day from 10-4pm

http://www.malode.com/nationalgetoutdoorsday/

Zip line, rafting demos, permaculture gardens and family fun!