The rally was organised to generate public opinion over the issue of "growing unemployment", demonetisation and GST.
"I would have loved to join the rally if assigned a role," the former chief minister said in his post on Facebook on Tuesday.
However, congratulating the Uttarakhand Congress for organising such a "large" and "impressive" rally, Rawat said he would request the PCC president to inform him in advance about such programmes in future.
"Having said that I must concede that it is not necessary to call everyone to every programme," the former CM said.
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Uttarakhand Congress held a Jan Chetna rally here on Monday with slogan shouting party workers led by PCC president Pritam Singh taking to the streets on motorcycles in protest against growing unemployment, price rise, GST, demonetisation and non-waiver of farm loans.
However, PCC president Pritam Singh said there was no question of Rawat not being informed about the rally as he was a senior leader besides being a former chief minister.
PCC's Chief Programme Coordinator Rajendra Shah said the former chief minister's office had been informed of the rally on January 28 on Whatsapp.
However, the episode does bring to the fore a communication gap between senior party leaders in the state ahead of the municipal elections due in March-April this year.
Ever since being thrown out of power in Uttarakhand in March last year, senior Congress leaders in the state are seldom seen sharing a common platform.