Just a skip down the Columbia River take Interstate 90 west to US -395 S. Continue to Pasco, WA take Interstate 182 west / US -395 south towards Richland/Pendleton. Take Exit 12A for US -395 south towards Kennewick/Pendleton. Continue on US -395 south and keep left at the fork, follow signs for Interstate 82 east Pendleton/Umatilla. Merge onto Interstate 82 east. Stay on the left 2 lanes to merge onto Interstate 84 east towards Pendleton.