Actually, I checked an online map app and saw that it was not that far. If you get off of the bus in front of the park, walk through the park away from the the highway then up the road that angles away to the left, you will see the fortress. Walk about 1/2 km and the road splits. Signs point both ways to the Citadel (Cetatea). The left hand is marked "auto" and goes the long way round to the road up the mountain. Stay to the right "pieton" (pedestrian) and continue past a cemetary on the right and you will come to a nice set of stairs going up to the fortress. There are trees on either side shading the stairway and nice benches every few steps on which to rest and catch your breath. Hey! I'm 64 and suffer neuropathy. If I can make it, then most healthy folks should be able to as well. Near the top of the stairs a path goes up on the right to the ticket booth and toilets.