Lake Haiyaha was a popular hike in Rocky Mountain National Park but in Summer 2022 it changed colors to a cool milky green bringing people from all over.
After parking (or taking hte shuttle) at Bear Lake Parking Lot it’s a 2 mile hike up to the lake, with stops at Nymph Lake & Dream Lake along the way. The trail is easy to follow and well maintained, definitely a few steep spots but nothing too wild.
As for why it changed colors – it all has to do with a rock slide from June of 2022 and scientists don’t know how long it’ll stick around.