If you haven't gotten out for a ride yet today, by all means do so! It's a lovely Labor Day here in DC, and I had an awesome morning ride from my girlfriend's place in Chevy Chase through Rock Creek Park, NW DC, and Takoma Park, to the University of Maryland campus.
The streets of DC were blissfully free of traffic this morning, and the temperature is just perfect. I did the 10 mile ride for the first time on my fixie today (39/15 gearing). What a workout When I'm not spinning like mad down the hills, I'm weaving back and forth and straining to climb up them... especially the hill on Sherill Drive out of Rock Creek Park. Lots of fun, though!