A triathlon in Columbia, Md. has landed Lance Armstrong, but at the expense of its status as a sanctioned race.

The Nation’s Triathlon is this Sunday, which means running, cycling and people plunging into the Potomac.

Swimming in the Potomac isn’t only ill-advised, but it’s also illegal. That could change, though only under very limited circumstances.

Good morning, Washington. Ten years ago today, the unfathomable happened. Iconic towers crumbled to dust, and the structure of a great military institution suffered partial collapse. Nearly 3,000 people died in merciless terrorist attacks on the World Trade Center and the Pentagon on September 11, 2001. If not for the remarkable bravery of 40 heroes, it’s presumed many more would have perished in Washington.

We already knew that D.C. Council Chair Kwame Brown was a hot yoga enthusiast. But a triathlete?

Over the weekend, former mayor Adrian Fenty competed in the D.C. Triathlon’s International Distance age group race — he completed in 2:25:34, which was good for 37th among “elite males.”

Photo by noahdevereaux. Those of you looking to move around the city by car tomorrow morning, take note: the fourth annual Nation’s Triathlon will close down various streets from 7 a.m. until 1 p.m. The triathlon involves a swim in the Potomac, a bike ride through D.C. and a 10K around the monuments, all winding up at the banks of the Tidal Basin. DDOT was kind enough to supply some alternate suggestions for you…

Thinking about driving around the Mall tomorrow? Uh, I’d think real, real hard about that one: tomorrow is the D.C. stop on the Dextro Energy Triathlon ITU World Championship Series tour. (Try saying that five times fast.) There’s a boatload of closures around the race course in the downtown area, including many major entrances into and exits out of D.C., such as the Whitehurst Freeway, Clara Barton Parkway, Rock Creek Parkway, and Maine Avenue off the Southeast and Southwest Freeways.

Looks like quite a few of you went down to cheer on competitors in this past weekend’s 3rd annual Nation’s Triathlon. William Schultz, 39, took first place in the challenging 1.5K swim in the Potomac River, 40K bike route and 10K run through downtown D.C., with a time of 2:01:50. Megan Knepper was the first woman to cross the finish line, at 2:17:37. And the District of Columbia’s most famous participant, Mayor Adrian Fenty, took…