Organizers of the Eau Claire Marathon are hoping potential thundershowers steer clear of the city Sunday for the fourth annual event.
Some 1,700 people have signed up for the day's races so far, which include a full marathon, a half marathon, a 2-mile race and a marathon relay.
"We have surpassed (last year's participation), and we're really excited," said Karen Drechsel, the event's lead organizer.
While more signed up last year, only about 1,200 ran in the races because of cold weather, Drechsel said.
Some 360 people have signed up for the marathon compared with 301 last year and more people are expected to sign up today for the races, Drechsel said.
Showers and thunderstorms are likely Sunday, according to the National Weather Service. The high is expected to be 59 degrees.
Drechsel said light to moderate rain probably wouldn't bother runners as much as it would inconvenience volunteers and spectators.
The marathon is a fundraiser for the Eau Claire YMCA's new building fund.
In its first three years the event has raised $98,000. Drechsel said she had hoped to reach $100,000 last year and that the races should easily surpass that mark this year.
People not attending the race still may want to be aware of its route if they're planning Sunday outings, Eau Claire police said.
Police won't shut down any roads completely other than Carson Park Drive, where the races originate, but there will be temporary delays along the races' routes, said Kyle Roder, community relations officer.
He encouraged commuters to plan and be patient.
If You Go
What: Eau Claire Marathon. The event will include a full marathon, a half marathon and a relay marathon.
When: 8 a.m. Sunday. People can attend a vendor fair from 11 a.m. to 7 p.m. today.
Where: The races start and end in Carson Park.