Acclimatization is the body's natural means of correcting altitude sickness, the rate of high altitude acclimatization depends on the altitude, rate of ascent, individual susceptibility and physical preparation.
It is very popular to ascend Mount Tochal (~3960) in Tehran before your Damavand ascent, besides that some of our packages scheduled to have dedicated acclimatization time, but it will ultimately depend on our final contract and participants' conditions during the program.