About Us Friends of San Lorenzo Creek, founded November 2002, is a California nonprofit public benefit corporation. Its principal office is in Alameda County. Contributions to Friends are tax-deductible (we are a tax-exempt organization under IRC 501(c)(3)). Articles of Incorporation (as of Oct. 13, 2008) Bylaws (as of Oct. 13, 2008) Initial Program and Policy Statement (Dec. 28, 2003)