Route map for 'The Anglesey Half Marathon ' - a 21.2km running route near Menai Bridge, UK. Plotted with the plotaroute.com route planner.
I'd recommend that you take a look at EV Trip Planner It's a great resource for working out the energy needed between any points. In an 85 you have about 75kWh available, I don't know about a 90, but 77 would be pretty safe. Allow extra power for rain, if its really cold or ...