 In cool , moist areas ranging from 4 @,@ 800 feet ( 1 @,@ 500 m ) to 6 @,@ 800 feet ( 2 @,@ 100 m ) , Douglas fir is predominant . <unk> pine and <unk> <unk> may be found alongside Douglas fir in cooler areas , both moist and dry , but particularly where <unk> pockets form . <unk> in this forest type are dominated by mountain maple , mountain ash , and blue <unk> in moister areas and white <unk> , common snowberry , elk <unk> , and <unk> in drier areas . Between 3 @,@ 400 feet ( 1 @,@ 000 m ) and 6 @,@ 500 feet ( 2 @,@ 000 m ) in the moist northern parts of the forest , grand fir is predominant and western <unk> is one of the first trees to become established during ecological succession following disturbances , whereas <unk> consist of mountain maple , mountain ash , blue <unk> , and <unk> <unk> . <unk> fir dominates from 4 @,@ 800 feet ( 1 @,@ 500 m ) to 7 @,@ 500 feet ( 2 @,@ 300 m ) along with mountain maple , <unk> , <unk> 's <unk> , <unk> alder , <unk> , Utah <unk> , and mountain ash . 
