There is no track
The circuit is the existing streets — up the hill from the harbour, round the hairpin, down through the tunnel and along the quay — closed and fitted with barriers once a year and returned to traffic afterwards.
Walking it is free and takes about an hour. The gradients are what photographs never convey: the climb from Sainte-Dévote is genuinely steep, and the hairpin is far tighter and slower than it looks.
If you are here in May
From roughly April the barriers, grandstands and fencing go up, and large parts of the harbour and the streets are progressively closed. Check what is accessible before booking anything.
Start at Sainte-Dévote and walk it uphill, the way the cars go. Downhill you learn nothing.
The Street Circuit
Chapelle Sainte-Dévote
Port Hercule