The Supporters Groups that founded, funded and award the Cascadia Cup needed to address the unbalanced schedule of 2018. Due to the odd number of teams, Seattle Sounders and Portland Timbers play three times while those two teams each play the Vancouver Whitecaps once.
After discussion, the Cascadia Cup Council — with even representation of the Emerald City Supporters, Timbers Army and Vancouver Southsiders, determined that the match between Seattle and Portland on May 13 will not count towards the 2018 Cascadia Cup standings, nor in any tie-breakers.
The following matches will count;
- Saturday, June 30 Sounders v Timbers
- Saturday, July 21 Sounders v Whitecaps
- Saturday, August Timbers v Whitecaps
- Sunday, August 26 Timbers v Sounders
- Saturday, September 15 Whitecaps v Sounders
- Sunday, October 28th , Whitecaps v Timbers
The winner is determined by total points within those matches.