"Fireworks on the Water," 9:30 p.m., Don Pedro Reservoir. Arrival before 8 p.m. is recommended.
Fourth of July.
Christian Heights Church Free Family Fourth of July Custom Car Show and Celebration, 10 a.m. to 4 p.m., Courthouse Square and Heart Rock Cafe, downtown Sonora.
Twain Harte Business Association and Historical Sonora Pass Wagon Train's first Fourth of July Bash, parade 11 a.m., followed by barbecue, pony rides and baseball, Eproson Park, Twain Harte, 586-1976.
Glorious Fourth of July Celebration, flag raising and firing of the anvil, 10 a.m.; parade, noon; games, 1 to 3 p.m.; tri-tip barbecue, 4 to 6 p.m., Columbia State Historic Park, 536-1672, www.columbiacalifornia.com .
Sierra Club day hike, meet 9 a.m., Mary Laveroni Community Park, Highway 120, Groveland, 962-7585.
Area 12 Agency on Aging, 10 a.m., agency office, 13975 Mono Way, Suite E, East Sonora, 532-6272.
Story Time for toddlers and preschoolers, 10:15 a.m. and 11:15 a.m., Tuolumne County Library, 480 Greenley Road, Sonora, 533-5507.
Tuolumne County Board of Supervisors Planning Committee, 2 p.m., Board of Supervisors Chambers, 2 S. Green St., Sonora.
Tuolumne County Citizens for Peace, 6 p.m., peace vigil, Courthouse Square, Sonora; 7 p.m., Aronos Clubhouse, Elkin and Stewart streets, Sonora, 533-3516..
National Alliance for the Mentally Ill, NAMI of Tuolumne County, 7 p.m., St. James' Anglican Church (The Red Church), 42 Snell St., Sonora, 532-7644.
Grassroots Tuolumne County, 7 p.m., Jamestown Community Hall, Main Street, 532-6378, 532-4850.
Tuolumne County Republican Central Committee, 7 p.m., Tuolumne County Administration Center, 2 S. Green St., Sonora, 533-5633.
Tuolumne County Youth Soccer, 7 p.m., Sierra Pacific Industries conference room, Standard Road, Standard, 532-5425.
Operation MOM-Military Family Support Group, 7 to 9 p.m., 20800 West Willow Springs Drive, Soulsbyville, 532-8051, (510) 329-9397.
Fourth of July.
Calaveras County Senior Network, 8:30 a.m., Foothill Village Retirement Community, 1400 Foothill Village Drive, Angels Camp, 728-0602.
Murphys Business Association, 8:30 a.m., call for location, 728-9325.
Calaveras County Planning Commission, 9 a.m., supervisors chambers, Government Center, 891 Mountain Ranch Road, San Andreas, 754-6370.
Angels Camp Landscape and Lighting District ad-hoc Committee, 9 a.m., City Hall, 584 S. Main St., Angels Camp, 736-2181.
National Active and Retired Federal Employees Association, noon, Black Bart Inn, 55 W. St. Charles St., San Andreas, 772-1854.
Wallace/Burson Business Association, 7 p.m., Rossetti's, 7670 Highway 12, Wallace, 763-5037, 763-5130.
(For arts and entertainment listings, see Weekend Thursdays. The Union Democrat Calendar attempts to list all non-commercial events of public interest in the Tuolumne and Calaveras county areas. Contributions are welcome. Call The Union Democrat, 588-4541, visit the office, 84 S. Washington St., Sonora, or e-mail us at: email@example.com .)