April equals art in Napa Valley, and all month the region celebrates with private collections open to public viewing and exclusive events at dozens of venues. For its part, the Napa Valley Museum presents Napa Valley Collects, displaying significant works from various Napa Valley collections, and featuring works by Joan Brown, Marc Chagall and Pablo Picasso. This week, the museum kicks off the festivities with the Napa Valley Collects Preview Gala. Live music and fine wines accompany the outstanding art, and proceeds benefit the Arts Council Napa Valley. The Gala takes place on April 3, at the Napa Valley Museum, 55 Presidents Cir., Yountville. 6pm. $50-$60. 707.944.0500.