Arlington County Department of Parks, Recreation and Community Resources, clean up Four Mile Run stream and Bluemont, Glencarlyn and Barcroft parks, wear work gloves and waterproof boots, 9 a.m.-noon March 8. 703-525-0168.

Arlington County Library, greeters, computer coaches and CyberCenter aides. 703-228-5260 or 703-228-7762.

Arlington Learning in Retirement Institute, instructors for college-level courses. 703-993-3152.

American Cancer Society, deliver daffodils to businesses and residences March 11. 703-937-1928. Also, volunteers for Ambassadors and Allies Program to inform communities about colorectal cancer prevention. 800-ACS-2345 or www.cancer.org.

Naomi Project, English- and Spanish-speaking mentors for high-risk pregnant women. Training begins March 20. 703-860-2633 or http://naomiproject.homestead.com.

Taste of Arlington, setup, cleanup, tickets sales, ice runners, public relations and Themore, event May 18. 703-841-7768, Ext. 240.

-- Sarah Lane

Looking for volunteer opportunities? These groups need volunteer help for a day, a week or on a regular basis. Nonprofit groups in need of volunteers should send notices to Volunteers, The Washington Post, 526 King St., Suite 515, Alexandria, Va. 22314. Notices also may be faxed to 703-518-3001 or e-mailed to alexextra@washpost.com. The list will be published on a space-available basis.