Dan Evans, a popular three-term Republican governor of Washington state who went on to serve in the U.S. Senate before leaving in frustration because he felt the chamber was too rancorous and tedious, has died. He was 98.

Evans died Friday, according to the University of Washington, where he had served as a regent and where the Daniel J. Evans School of Public Policy and Governance bears his name.

“Dad lived an exceptionally full life,” his sons — Dan Jr., Mark and Bruce Evans — said in a written statement quoted by The Seattle Times. “Whether serving in public office, working to improve higher education, mentoring aspiring public servants … he just kept signing up for stuff right until the end. He touched a lot of lives. And he did this without sacrificing family.”

Evans was a dominant force in Washington politics for decades and, until current Gov. Jay Inslee, he was the only person to be elected governor three times.

Born in 1925 in Seattle, Evans was a civil engineer before entering politics. He was elected to the state Legislature in 1956 and won the governorship in 1964, beating incumbent two-term Democrat Albert D. Rosellini and prevailing in a bad year for his fellow Republicans, one which saw President Lyndon Johnson soundly defeat the GOP’s Barry Goldwater.

Known as a moderate to liberal Republican, the avid outdoorsman helped add new recreation and park areas in the state and supported clean air and water legislation. He created the nation’s first state Department of Ecology, which President Richard Nixon used as a model for the Environmental Protection Agency.

Evans also unsuccessfully pushed to create a state income tax. He opted not to run for a fourth term.

After leaving the governor’s mansion in 1977, Evans stayed in Olympia, serving as president of The Evergreen State College. Evans had helped create the state school when he signed an act authorizing the liberal arts college, and as governor he also backed founding the state’s community college system.

He built a national profile during his time leading the state and was the keynote speaker at the 1968 National Republican Convention. He was mentioned as a possible running mate for President Gerald Ford in 1976. Never a fan of Ronald Reagan, Evans supported Ford in 1976 and initially backed George H.W. Bush in 1980.

As a popular Republican in a predominantly Democratic state, it seemed that Evans would be a shoe-in had he decided to run for the U.S. Senate. He frequently spurned such talk, saying in 1972 that “I don’t like Washington, D.C., very well … and I could not stand to be in the Senate.”

However, in 1983 Democratic Sen. Henry “Scoop” Jackson died in office, and Evans accepted an appointment to serve out his term. Evans opted not to stand for election in 1988, citing the “tediousness of getting decisions made.” At the time he said he was looking forward to returning home to enjoy the outdoors.

In later years Evans served as a regent at the University of Washington, his alma mater. He also served on many nonprofit and corporate boards.