The 100-feet-long mast of the holy flag holds a special place in the fair which derives its name from it. legend had it that the Guru Ram Rai selected the place where Darbar Sahib is now located as the site of his camp (Dera) and hoisted a flag. The name Dehradun is believed to be derived from the word Dera. The officer in charge of the fair, B P Saklani said that the mast of the flag is actually a stem of Sal tree. He informed that the flag mast is changed after three to five years and this year the mast is not changed. The Mahant himself selects the tree which should be used as mast of the flag. A team of saints headed by Mahant visits the Doodhli forest located in Dehradun and after careful scrutiny a tree is selected for the holy Jhandaji.