David Ferreira gave Dallas the lead in the 37th minute with his second goal of the season, but Cummings produced the equalizer after taking a pass from Mehdi Ballouchy.
The Rapids (5-2-6) are unbeaten in their last eight games. Dallas (3-7-5) has lost only once in its last seven games, but is still in seventh place in the Western Conference.
Copyright 2009 by United Press International.