On Sunday, thousands of athletes will take to D.C.'s streets to compete in the Nation's Triathlon.
Technically, it's not a triathlon anymore - organizers canceled the swim portion after the week's tropical weather made swimming conditions dangerous.
But the remaining bike and run segments will still go on, which will force road closures around the capital.
Those street closings start Saturday evening, when Ohio Drive from Inlet Bridge to Independence Avenue will be shut down until 8 p.m. Sunday.
The rest of the road closures will start Sunday morning at 6 a.m. Roadways at the top of the list will begin to open back up at 11:30 p.m. after racers clear. By 2:00 p.m. Sunday, all participants must be off the course, and all of these roads will reopen.
Clara Barton Parkway to Caderock
Canal Road - M Street to Clara Barton
Potomac River Fwy southbound
Potomac River Fwy northbound
27th between K and Virginia Ave
Rock Creek Parkway Independence to Calvert Street
23rd between Memorial Circle and Independence Avenue
15th Independence to Constitution Ave
Independence Ave RCP to 15th St
Maine Ave 15th to Ohio Dr
Ohio Dr around Haines Pt to Inlet Bridge
Across the river in Virginia, September 11 memorial events at the Pentagon will affect traffic as well. For a list of road closures there, click here.