You will find below some descriptions about some of the most famous climbing  peaks in Iran such as Mt. Damavand (5,671 m), the highest Mt. in the middle east, Mt sabalan (4,811 m) & Mt. Alam Kuh (4,850 m) located in Takht-e-Soleyman region.

To get more info about the above mentioned peaks, please click the following link:
 Iran Climbing Mountains

The below link will give you some descriptions about two large Iran mountain ranges
Iran Mountain Ranges

If you are looking to get information about big climbing walls in Iran, try the following link:
Iran Big Climbing Wall

Looking for a ski resort in Iran  to spend your winter holiday, take a look at this link:  
Iran Skiing Resorts

And here is a link to a table which will tells  you when is the suitable time to travel to Iran if you would like to climb a peak, trek or have a historical and cultural visit:
Iran Trip Seasons