Given a late departure, my only choice was the Olympia Ave. route -- the best exercise on a (time) budget. 5:36 to the beginning of the uphill at the base of Oly Ave, 16:26 to Observatory Drive, 25:50 overall. Probably within random error compared to the last time of 25:30.
I had some right hip soreness (which I associate with sacroiliac problems, but the SI itself was not sore). I also felt some twinges down the outside of my right thigh, those went away later in the walk. Overall, the hip was no sorer at the end than the beginning, so I don't consider it to contraindicate exercise at this time.