HomeUSAWashingtonCentral-West Cascades & SeattleSkykomish ValleyIndex** Bouldering at IndexRiver BouldersRock Island LineRock Island LineLAT,LNG 47.81728, -121.60260CREATED UPDATED Edit MapShareDescription[Edit]No description available. Be the first to contribute!Add description 1 ClimbsComing soon: New Climbs1Rock Island LineV6Bouldering