If you go to karjat region you will find awesome trek locations.
lonawala is also nice but you will need a guide.
and the smallest trek you can do in pune is Sinhgad.
Multiple location mam.. For this season i think you should probably try out for night trek ( at rajgad, torna, rajmachi, kenajlgad kalsubai., gorakhgad ) or small forts like rajmachi, lohgad, visapur, ghangad, korigad. Hopefully it will help.. If you want more info about it then you can visit our page on instagram (162k followers) link as follows.
https://instagram.com/durg_naad?utm_source=ig_profile_share&igshid=1bgockvm1om21
If you are looking for some adventure and fun you must check out Bhandardara, dist. Ahmednagar, Maharashtra. It's an amazingly beautiful place. There are mountains all around. Bhandardara is situated in the midst of Sahyadri range. You must visit this place once at least. Check out The Land Of Wanderlust (TLOW) website..... https://thelandofwanderlust.com/
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Warm Regards