The match, played in a steady drizzle at the start and throughout the second half, was knotted at 1-1 until a late flurry from both teams.
The goal came less than a minute after Salt Lake missed out on a rare 4-on-1 breakaway that didn't even produce a shot on target.
Dallas leveled the match in the 43rd minute on a penalty kick by Franco Jara, who calmly placed his ball in the lower right corner, opposite of the direction that RSL goalkeeper David Ochoa dove in error. The penalty kick was awarded after RSL's Marcelo Silva fouled Jader Obrian in the box.
FCD dominated the statistics, outpossessing Real Salt Lake 62.2 percent to 37.8 percent, amassing 29 shots to just 11 from the visitors with a 10-3 edge on shots on target, racking up 15 corner kicks (a season-high) to one for RSL, and earning a 518-328 advantage in total passes.
The wet conditions had an effect on things in the early going and after halftime, with plenty of slipping by the players and the ball skidding along the wet pitch.