Mary Peters Bolton, daughter of Mr. and Mrs. Kenyon C. Bolton of Cleveland, Ohio, was married here last Saturday afternoon to John Charles Hooper, son of Mr. and Mrs. John A. Hooper of Woodisde, Calif. The ceremony in St. John's Church on Lafayette Square was performed by the Rev. John Jessup with the Very Rev. John C. Leffler, retired dean of the Episcopal Cathedral in Seattle, assisting. The reception was held at the Textile Museum.

The bride wore a 100-year old wedding gown worn by her great-grandmother, Julia Castle. She was attended by Margaret Warner, maid of honor; Mrs. Philip P. Bolton and Mrs. Thomas C. Bolton, her sisters-in-law; Helen Hooper and Mrs. Francis Blair, sisters of the groom; Mrs. Jerome Gratry and Mrs. James Gerrity Jr., her cousins, accompanied by Mrs. Robert Morrill, Katherine C. Brengle, and Cornelia W. Brown. The groom's father served as best man.

The bride, until recently a reporter with States News Service in Washington, is a graduate of St. Timothy's School in Stevenson, Md., and Radcliffe College. Her father retired last year as honorary French consul to Cleveland. She is the granddaughter of the late Chester C. and Frances Payne Bolton, who both served as members of Congress from Ohio, Mrs. Philip R. Peters of Lancaster, Ohio, and the late Mr. Peters, who was president of the Fairfield National Bank of Lancaster.

Mr. Hooper, an environmental lobbyist with the Wilderness Society, begins work next month with the Sierra Club in San Francisco, where the couple plans to reside. He was graduated from Groton School in Groton, Mass., Harvard College and holds an M.A. in international relations from Boston University. His father was formerly U.S. defense representative to NATO and he is a grandson of the late Arthur W. Hooper, who ran a family shipping company in San Francisco, and the late Alan J. Lowrey of San Francisco, who was associated with the Union Oil Co. of California.