Mountains Pinovo and Tzena are the natuaral continuation of the mountain range of Voras (Kaimaktsalan), the 'spine' that constitutes the natural border of Greece and its northern neighbours. Crystal clear and blue waters, waterfalls, hundreds of different mushroom species, an extended footpath network and untold panoramic views!
There are many lovely places to stay in a range of a few dozen kilometers. Pick the village that suits you best or is closest to where you want to hike. Here's a google search based on location
Get in touch with the local Mountaineering Association and they will help you with much information on what to do. You might even follow them in one of their excursions ranging from beginners' objectives to full 2 day treks.