Woodward MTB Skills Progression Park in Fresno is holding their grand opening on May 10th, 2008.
The newest MTB park in NorCal (joining recently completed Folsom) features "10 Acres of progression based riding in Fresno, California. Beginner, intermediate, and Expert level riders will find one of the most dynamic mountain bike parks in the country." You can check out a map of the park here (PDF). The park was designed by HILRIDE Progression Development Group.
May 10th is also the Fresno Cycling Festival, which features MTB races in the new park.