Best approach is by the 73A road connecting Rozsnyó (Rosenau, Râșnov) with Predeal, where a small mountain resort Hidegpatak (Pârâul Rece) situated right at the col offers a good starting point to all 3 summits.
I was of course beginning with the closest summit, YO/EC-252, Piatra Arsă, which is right next to the resort and also has a quite good forest road up to near the summit. Actually half of the road is also paved and leads to the Forrest Administration's hut, so it might be doable up until there by car, but I think you might need a special permit to access this road by car, at least this is what the panel at the entry of the road suggests:
|The starting point of the forrest road|
|Panorama from Pârâul Rece|
|The summit of YO/EC-252|
|Shack on YO/EC-252|
So that was it for today, but at least I could check out the tracks to the summit, so I can give you two possible approaches as I mentioned before:
|Track to the summit YO/EC-252 from the 73A road (blue the forrest road, yellow the shortcut)|