DesertUSA has a wildflower report for Saddleback Butte State Park on 3/7/14:
Saddleback wildflowers are exploding! There are carpets of yellow coreopsis with gilia mixed in at the north half of the park/picnic area, and the south half/campground area is covered with fiddleneck and a mix of other wildflowers. It smells lovely and the color is beautiful! Come out for a picnic, or stay the night among the wildflowers. No telling how long it will last, but there’s still a lot of buds on the flowers so we’ve likely got a few weeks. Saddleback Butte State Park is a state park in the Antelope Valley of the western Mojave Desert, in Southern California. It is located east of Palmdale, near the community of Lake Los Angeles.
See photos and more reports for Southern California at: Desert Wildflower Reports for Southern California by DesertUSA.