I could only make out a little of the trail by Reagan Airport as I passed on the metro, but it seemed ride-able, though I am sure I would have to walk to bridges. Does anyone have any reports on the Mt Vernon trail from south of Old Town to the 14th street bridge?
You should have riden today -- beautiful powder snow, wonderful to ride in. The streets in my neighborhood were all unplowed, so the trail was probably the same sort of riding surface. Tomorrow, peds plus the freeze-thaw cycle may well have turned the trail into a moonscape. Even so, it should be doable with good studded tires.
By tonight, Tuesday, the Mount Vernon trail is mostly clear between the bridges and the airport. The snow and ice that remains is not too bumpy, and the powdery stuff is just off the trail. Highly recommended. I rode studs, but didn't really need them this evening.