A SIDE NOTE
Driving in Napoli is a dangerous, tedious and caustic experience. To and from Sorrento: countless CO-chocked tunnels, hundreds of slow-moving Buses (Local & Tourist) with catchy names and expressive well designed color schemes, narrow roads, off-camber turns, broken concrete, well-dressed-but-useless traffic cops, ancient cobbles, buzzing motorcycles, farting scooters and stop-n-go traffic for 7k & forty minutes at a time. Napoli: The same, but flatter and hotter and more intense + Traffic Light Dudes forcing (opt out style) packets of napkins and stuffed animals onto your dash/under your wipers unless expressly forbidden, and even then, often enough. That said, 7k of on the E45 between Pompeii and Mount Vesuvius is down-right pleasant.
At 1:30pm we park in the Piazza del Plebiscito, we walk to Gran Caffe Gambrinus (a temple of the intellectual elite according to their website, and the oldest coffee shop in Europe according to someone at Castelli) to use their bathroom, moments later sign-in begins. The figure-eight-like circuit runs for 6k or so along the waterfront, it’s walkable and heavily spectated.