I managed a
54 km (34 mile) EV-only round trip last evening to go kayaking on a nearby lake I haven't been on before. The car's official EV range is 40 km / 25 miles.
I babied it, but that's not bad considering the aero is wrecked by having the hatch open. Further wrecked by windows open too. No AC use.
Weather: hot... 29 C / 84 F. Light breeze.
Roads: ~10 km of sub/urban driving (eg. stop signs, lights, light traffic), the rest on rural roads with a mix of 70 km/h (44 mph) and 80 (50) speed limits.
Mods: elevated PSI; eco mode
From what little I've read on Prius Chat, getting 30-40 EV miles from a Prime isn't uncommon in favourable conditions.
Oh, and a Tesla Model S showed up to see me off!
(No idea whose it is. I've never seen one parked in this area before.)