On May 26, a district court upheld a Moscow government resolution prohibiting the march, as opposition to the planned event was strong in Russia, especially from the Russian Orthodox Church and other religious leaders.
But Dmitry Barbenev said he and the other event organizers had decided to contest the ruling.
"We have filed a short appeal with the Moscow City Court against the Moscow Tverskoi Court's ruling, as the full text of the decision is still not ready yet," he said.
Despite the ban about 200 people took to the streets in an unsanctioned demonstration to mark the 13th anniversary of homosexuality being decriminalized in Russia.
The attempt resulted in violent clashes between sexual minorities and their opponents - representatives of a number of political parties, religious and radical movements - and the detention of some 120 people from both sides, most of whom were later released.