Portland's Timbers Army are renowned for their consistently epic pregame tifo displays at Providence Park, and on Sunday they raised their game yet again as Audi 2017 MLS Cup Playoffs action arrived in the Rose City. 

The Timbers' devoted supporters group produced another gem as their team faced off with the Houston Dynamo in Leg 2 of their Western Conference Semifinals series, taking inspiration from the Lewis & Clark expedition that explored the Northwest United States in the early 1800s.