Hiking place Bangalore ??

If you want to go on hike, go to western ghats of Karnataka.
Not blore.

Good options are
Kudremukha, kodachadri, kumara parvata, tandiandamol, nethravati, bandaje.

Nandi hills, Skandagiri

You can go with backpacking groups like backpackers united, trippertrails. They have pretty good options and you’ll enjoy the overall backpacking experience and make friends. Highly recommend both of them. Regarding places, these groups go to chikmagalur, coorg, ooty, gokarna etc. my personal favourite is the gokarna beach trek. Splendid views