If you want to know more about the Threshold network, don't miss our Community section, where you will learn our history and traditions, answers to some frequently asked questions and detailed guidelines about joining Threshold.

If you are seeking information about Threshold’s annual Grants Cycle, please visit the Grants Section.

The Threshold Foundation main office is located in Tides Foundation offices in San Francisco.

Threshold Foundation
PO Box 29903
San Francisco, CA 94129-0903

Tel 415.561.6400
Fax 415.561.6401

General Inquiries: threshold@tides.org
Grant Inquiries: tholdgrants@tides.org