Cruella de mom - it's not until April 11, so I have time for a 5k race next weekend, and then at least one full 20 the week after. With a short taper, I might manage another beyond that. It wasn't so bad - not much longer than "A Knight's Tale", though the 20 would have required a longer movie or an additional show.
For some reason, 5 miles on a gym dreadmill is very different from 5 at home. I suspect that, while it is physically easier, the inability to watch what I want to watch makes it more mentally challenging. OTOH, the Y doesn't like me using one of their 'mills for a couple of hours in the morning.
Edit - my HRM no longer lies to me. I've only had it 18 months or so, and the battery is supposed to last for 3 years. But, when the battery starts to go, the HRM starts giving out some crazy readings. . . like a heart rate of 233. Change the batteries, and all was well. good to know that tachycardia wasn't the culprit.