Wait, where are you in Stockton? From downtown Stockton to downtown Brentwood is about 30-40 minutes. Not bad, really. I drive about 35 minutes to our agility classes. I can PM you the facility's address if you want.

Also, if your pup looks pretty much purebred, it wouldn't hurt to join a local AKC obedience/agility club. I think there are some out your way.

For some upcoming agility events in Nor Cal:
20, 21 OCTOBER 2007
AKC Trial - Pleasanton, California
Del Valle Dog Club of Livermore
Pleasanton Fairgrounds (4501 Pleasanton Ave.) - Outdoors on grass

20, 21 OCTOBER 2007
USDAA Test - Madera, California
Canine Agility Team
Madera Fairgrounds (1850 W. Cleveland Ave.)

20, 21 OCTOBER 2007 (this one is closest to you)
CPE Trial - Elk Grove, California
Fun Paws Agility Club
WAG K9 Facilities (10925 Bruceville Road)

21 OCTOBER 2007
Run Throughs - Penngrove, California
Paws-to-Play Agility (501 Ronsheimer Road)

27, 28 OCTOBER 2007
AKC Trial - Placerville, California
Hangtown Kennel Club
El Dorado County Fairgrounds (100 Placerville Dr.)

27, 28 OCTOBER 2007
Howl-a-ween Fun Weekend Fun Match - Elk Grove, California
WAG
WAG K9 Facilities (10925 Bruceville Road)

For a complete list: http://slipstreamaussies.com/calendar/