He was also a founder member of Maidenhead Golf Club in Berkshire, formed in 1896. It was the friendship of one local founder member, Dr G E Moore, with Grenfell which really got the project off the ground. Grenfell was the Mayor of Maidenhead in 1895 and 1896 and an extremely wealthy and competent businessman who owned more than 10,000 acres of land around the town. Grenfell offered to lease some of his acreage near to Maidenhead Railway Station, which was to become Maidenhead Golf Club and remains so well into a second century. Grenfell became one of the earliest 63 members of the club, and its first president and agreed to present “a challenge cup for competition”. This was the Grenfell Cup which is still in yearly competition.