A wide range of volunteer service trips are available to county residents, both at home and abroad. The alphabetical listing below is a sampling of organizations that host volunteer programs.

Information was taken from the each organization's Web site. For details, contact the organization directly.

AMERICAN HIKING SOCIETY1422 Fenwick LaneSilver Spring, MD 20910301-565-6704www.americanhiking.orgVolunteers work on a variety of projects to build, maintain and restore hiking trails, and to promote hiking.

AMIZADE LTD.PO Box 110107Pittsburgh, PA 15232888-973-4443412-441-6655www.amizade.orgOffers a wide variety of international volunteer opportunities.

CROSS-CULTURAL SOLUTIONSwww.crossculturalsolutions.orgNonprofit international volunteer organization with a variety of volunteer programs in Brazil, China, Costa Rica, Ghana, Guatemala, India, Peru, Russia, Tanzania and Thailand.

EARTHWATCHwww.earthwatch.orgWorldwide scientific field research and education to promote the understanding and action for a sustainable environment.

ELDERHOSTEL11 Avenue de LafayetteBoston, MA 02111-1746617-457-5502www.elderhostel.orgwww.roadscholar.orgService programs can include anything from teaching English to students overseas to archaeological digs or restorations.

GLOBAL VOLUNTEERSwww.globalvolunteers.orgVolunteers live and work with local people on life-affirming community development projects for one to three weeks.

HABITAT FOR HUMANITY INTERNATIONALwww.habitat.orgGlobal Village trips give participants work alongside members of the host community building decent, affordable housing worldwide.

PASSPORT IN TIMEwww.passportintime.comVolunteer archaeology and historic preservation program of the USDA Forest Service.

SIERRA CLUBSan Francisco, CA 94105Phone: 415-977-5500Fax: 415-977-5799www.sierraclub.orgWorks to restore wilderness areas, maintain trails, clean up trash and campsites and remove non-native plant species.

UNITED PLANET QUEST PROGRAM800-292-2316www.unitedplanet.orgVolunteers work from one to 52 weeks in countries throughout the world improving issues such as education, healthcare, environmental conservation, housing and disabilities.

WILDERNESS VOLUNTEERSwww.wildernessvolunteers.org928-556-0038.This group hosts about 50 weeklong trips per year in cooperation with public land agencies. Difficulty levels vary and target a range of age groups.