CONCACAF released the pot assignments for the 2018 Champions League Wednesday morning. The results were predictably not-good for the Rapids. The higher seeds are in pot 1 and the lower seeds are in pot 2.
Pot 1: Toronto FC (CAN), CD Guadalajara (MEX), Club America (MEX), Tigres UANL (MEX), Club Tijuana (MEX), FC Dallas (USA), New York Red Bulls (USA) and Seattle Sounders FC (USA)
Pot 2: Deportivo Saprissa (CRC), CS Herediano (CRC*), Cibao FC (DOM), FC Motagua (HON), Club Deportivo Olimpia (HON), Tauro FC (PAN), Santa Tecla FC (SLV) and Colorado Rapids (USA)
The Rapids were designated for that pot via the CONCACAF Club Index, which is apparently a thing that exists, though I have never before seen it or heard of it.