The rivalries in Cascadia are the oldest in MLS. And the one between the Portland Timbers and Vancouver Whitecaps, spanning back decades, reignites this Sunday, May 22 when the two teams meet at Providence Park (4:30 pm ET, ESPN and ESPN Deportes in USA, TSN in Canada).
But what's fueled the fire in recent MLS years? We mapped out some key elements of the rivalry for each team, both on and off the field, home and away. Click on each image for the complete lowdown.
