Martinez Senior Center emergency preparedness class 10 a.m.-noon Oct. 26, 818 Green St. Learn how to prepare yourself, family for major disaster. Free. 925-370-8770.
Men's chorus performs
Devil Mountain Men's Chorus performs 1:30 p.m. matinee; dinner show 7 p.m. Nov. 3, Shadelands Art Center, 111 N. Wiget Lane, Walnut Creek. Matinee $15, dinner show $30. Reservations: 925-284-9042.
Hello Halloween crafts, activities, treats 1:30-3:30 p.m. Oct. 26, Nancy Boyd Recreation Room, 525 Henrietta St. For grades K-5. $10, includes materials. Registration: 925-372-3510.
Trunk or Treat 5:30-7:30 p.m. Oct. 26, Pleasant Hill Park parking lot, 147 Gregory Lane. Crafts, activities, treats. Prizes for decorated vehicles. Hot dogs, drinks $1. Vehicle registration $5: 925-682-0896.www.pleasanthillrec.com.
Trick-or-Treat Halloween night 4-6 p.m. Oct. 31, Crescent Dive, downtown Pleasant Hill. Tricks, treats, children's activities. Free. 925-580-4202,
Marty O's Halloween Hunt 3:30-5 p.m. Oct. 25, Holiday Highlands Park, Figtree and Eastwoodbury Lane, Martinez. Crafts, candy, face painting for ages 3-12. Free. Space limited. Registration: 925-372-3510.
Taste of the vine
Seniors sip wine with friends 3-5 p.m. Oct. 26, Pleasant Hill Chateau III, 175 Cleaveland Road. Wine, hors d'oeuvres, nonalcoholic beverages. $7, $10 at door. Tickets at Senior Center, 249 Gregory Lane, Pleasant Hill. 925-682-0896.
Young People's concert
Young People's Symphony Orchestra, 8 p.m. Nov. 3, Walnut Creek Presbyterian Church, 1801 Lacassie Ave. Performing Brahms, Theofanidis. $15-$20. Tickets: www.brownpapertickets.com. 510-849-9776.
Downtown Martinez Ghost Walk, 8 p.m. Oct. 26-27, 29-31, 649 Main St., Martinez. Guided walking tour to discover hidden past, learn facts, tales of days gone by. $25. Tickets: 925-228-3577, ww.mainstreetmartinez.org.
Chamber music at St. Andrew's 3 p.m. Oct. 28, 1601 Mary Drive, Pleasant Hill. Music from Baroque period, more. Free, donations appreciated. Proceeds benefit Contra Costa Interfaith Housing project. 925-228-7731, firstname.lastname@example.org.
Mt. Diablo Astronomical Society stargazing 6-9 p.m. Oct. 26, Heather Farm Park, 505 N. San Carlos Drive, Walnut Creek. Observe moon, star clusters, nebulae, more. Free. Details: 695-3134, www.mdas.net, email@example.com.
Free e-waste drop off
E-waste recycling 9 a.m.-1 p.m. Nov. 3, Diablo Valley College, 321 Golf Club Road, overflow parking lot 7, Pleasant Hill. Drop off unwanted electronics. For list of acceptable items, visit www.co.contra-costa.ca.us/depart/cd/recycle/options/e-waste.htm.
Items included on a space-available basis; not all items will be published. Email firstname.lastname@example.org or fax 925-943-8362.