San Francisco Supervisor Sandra Lee Fewer told The Chronicle that she is 90% sure she’ll run for re-election in 2020.

Her comments allay months of speculation within City Hall about whether the District One supervisor — who represents the Richmond District and other surrounding neighborhoods — would seek another four-year term on the Board of Supervisors. Fewer said she is having the “final discussions” with her family about what another term would mean for their bucket lists.

“When you turn this age, you start to look at time very differently,” Fewer, 62, said in an interview.

“We’ve always wanted to take a trip across the U.S. in a car, or in a camper, and we’ve always wanted to see Machu Picchu,” in Peru’s Andes Mountains.

“But how many more years can you do it with your knees?” she added.

The supervisor did not provide a firm answer on when she would make her final decision. But she has plenty of time: Board hopefuls have until June 9 to declare their candidacy.

Fewer and her husband recently bought a home in San Rafael, where they hope to eventually retire. But, she said, they don’t plan to move out of the Richmond — where she has lived since 1959 — anytime soon.

“I’m not moving,” she said. “We are just planning for 20 years down the line for our future.”

Fewer, who is chair of the Budget and Finance Committee, is considered one of the most progressive members of the Board of Supervisors.

She eked out a victory in 2016 over nine other candidates. Her most formidable competitor was Marjan Philhour, who is now a senior adviser to Mayor London Breed.

When asked if she would run again, Philhour said: “I really enjoy my job, and I have no plans to run against Supervisor Fewer.”

While the idea of running for another term may mean putting off her big travel plans, Fewer said she would want another four years to see her initiatives through.

Some of her recent legislation includes helping create the Office of Racial Equity and giving nonprofits first dibs on purchasing multifamily residential buildings.

“There’s a lot of unfinished business,” Fewer said. “You don’t realize how quickly four years goes by.”

Trisha Thadani is a San Francisco Chronicle staff writer. Email: tthadani@sfchronicle.com Twitter: @TrishaThadani