We drove to Civita di Bagnoregio today from Montepulciano and found visiting an exhausting experience.
We parked as close to the bridge as practical (in one of the moderately large parking lots at the top of the hill about a quarter mile from the cafe in the shady area above the bridge). It was then a long walk, first by steep stairs down and then a steep hill down, to even get to the bridge. Then a long walk across, part of it uphill ... then back across the bridge and an UPHILL hike back to our car.
Might be fine on a cool day but it was hot and sunny (low humidity thankfully). Rick mentions a shuttle bus but does that drop you off any closer to the bridge??
Are bicycles allowed on the bridge? We did not see any, but if yes, that would be a more pleasant way to visit. Granted, half of it is still uphill, and on a hot day not ideal, but might still be preferable for some readers. Anyone know what time the bridge opens and closes? Might be best to visit early or late in the day during warm months. (We went in May... cannot imagine doing it in summer.)