- Workshop Presenters Needed Sonoma County Conference March 29, 2003 The tenth annual Expanding Your Horizons Sonoma County conference will be held on Saturday, March 29, 2003, at the Santa Rosa Junior College. This year's conference is being planned for 450 seventh and eighth grade students from throughout Sonoma, Lake, and Mendocino counties. Expanding Your Horizons is a conference to increase ...eyh-soco.org