Trekking in Kartepe, Yuvacık, Kefken, Kerpe, Bolu (Istanbul)

Hello All,
Yet another monday morning and the best way to deal with it is to plan for the weekend.
I have been trekking and cycling in Kartepe, Kefken, Yuvacık, Kerpe, Bolu for some time now.
Closest one being 90 kms from istanbul those places are stunning to walk in.
Hence, I would like to see if any one interested to form a group of people to
go to these places for walking and having a nice lunch or brunch from local delicatessen.
So here are the options;
We could have an open buffet in kartepe in saklıvadı with an amazing sapanca lake view and then drive to kefken and have a walk between seyrek to sarısu Protected content of walking) in a trail between sea and forest.
Or, We could drive to Yuvacık, and have nice alabalık and mantar in güveç then
walk to şahin tepesi Protected content altitude) in total of 10 kms.
or for passionate people, we could drive to Bolu, the most stunning place among the ones that I mentioned and have a walk around 7 göller (7 Lakes) and have a nice barbecue and wine !
I have a car so this means I have 4 seats available.
So give me a shout if you are interested and feel free to ask me on
Protected content
Bye !