Guy Ladd Frost, an architect and curator from Roslyn and East Hampton who had fought on behalf of the Bridgehampton Race Circuit motor track, died on March 14 at the age of 85.

He died at the Sands Point Center for Health and Rehabilitation in Port Washington, his daughter, Jessica Frost said. Diagnosed with Lewy body dementia in 2012, he was transferred to the facility last year after suffering a stroke.

An architect who graduated from the Rhode Island School of Design, Frost has designed many of Long Island’s two-story homes and has dedicated himself to historical and architectural preservation. Passionate about motorsports, he was particularly interested in “The Bridge” as the track was called, built in 1957. It has hosted racing stars such as Mario Andretti, AJ Foyt, Richard Petty and Al Unser until ‘until a 1980s noise ordinance made it suitable only for amateur racing, and it was demolished in 1999 for a golf course.

Frost, a member of the Sports Car Club of America and founder of the Bridgehampton Racing Heritage Group, has himself taken part in amateur races, in cars including a Fiat X1 / 9 and a vintage open-wheel Formula Racer. From 2004 to 2010, he hosted celebrations for the Vanderbilt Cup races in Garden City and Roslyn Harbor.

A member of the Town of North Hempstead Historic Monuments Preservation Commission, Frost has worked to preserve structures in that town and Roslyn, where his architectural drawings and documents were donated to the village’s Bryant Library.

Guy Frost was born January 17, 1934 in Brooklyn, to Rose and Stanley Frost.

From 1954 to 1958, he served as an aircraft controller in the US Air Force in Japan and later in Montauk. He met his future wife, Donna Dussault, in college, and they were married on Memorial Day in 1959.

The couple bought a house in Roslyn in 1965. There they met oral surgeon and Navy Captain Dr. Roger Gerry, a noted curator, with whom he spent a quarter of a century helping restore structures, including the Ellen E. Ward Clock Tower. The Frost moved to East Hampton in 1973 and Port Washington in 2015.

As a father, “He’s been incredibly supportive of me,” said Jessica Frost, 48, associate curator of the permanent collection at Guild Hall in East Hampton. “He had a great sense of humor and could be quite silly at times.”

Besides Jessica, he is survived by his wife; a second daughter, Erica French; a son, Christophe; and five grandchildren. A memorial is scheduled for Saturday April 20 from 12 p.m. to 2 p.m. at the Bryant Library in Roslyn.