twice around Brooklyn Bridge park. It wasn't easy but it was actually a pretty good pace, taking no more than 2 hours, and closer to an hour 30.
The distance was challenging but not hard or unachievable.
Feet felt fine for most of it. I do want to get in another long run, early next week. One shorter one this week after a longish bike ride? Friday? as many swims and yogas as I can. Plus plenty of sleep.