Siddhagad

Reach Kalyan early morning, buses ply to murbad every hour, from murbad reach the base village narivali by bus or local transport. The trek can be completed in a days time if started well in time.

Siddhagad is known for its rich forest and one can encounter rough terrain as you reach greater heights. The forested patches and paddy fields along the course are a pleasure to see. Locals are very helpful and it is advised to take one along as a guide (a small tip does the work) as the paths are confusing at certain points. A 2 hr ascent takes you to a village close to the top where one can refill water, take some rest and move on, the path leading to the top from here is quiet steep, rocky and takes you along the edges several times, being cautious would be helpful :).

One needs to cross a small stream along the patch which floods to great proportions and gets extremely swift at certain points if it rains heavily. A similar incident happened to us, one of my friends lost grip and got carried away in to a 10-12 ft deep ditch, thankfully he wasnt dragged further.
Snippets of the same:

Mahuli

Come monsoons and the western ghats become more inviting than ever. Mahuli is just the right one as a starter with a flavour of all kinds to offer. An early local to asangaon from mumbai and a 10 minutes ride to the base village gets you going.
The trek as such is very easy and can be easily completed in a day. There is a water cistern at the top but its better to carry enough water along, also caves at the top could provide a good stay for an overnight trek. One can also reach kalyan darwaja if equipped with proper rock climbing accessories.

Khandala beckons

If planning to get there from mumbai, its better to take Sinhagad express early morning around 5ish which takes you through khandala. A small walk towards the Khopoli water electricity centre gives way to a rocky patch in to the hill, follow it to reach the Duke's nose commonly known as "Nagphani" in the local tongue.

There are two patches to the top, one involves steep rock climbs which just grazes the projection. This patch offers an overwhelming view of the terrain and rains accompanied by gusty winds make the climb interesting with droplets constantly bombarding your face. The other patch is more of a walk and can help you reach the top with lot more comfort, nonetheless its a huge compromise for adventure lovers and could be rather used during the descent. Reach the top to find a shiv mandir and if you are lucky enough some prasad could be awaiting you.

Bushy dam was a huge disappointment, highly commercialized and crowded it wasn't a spot I would prefer giving another visit.