 In north @-@ central Montana , some 1 @,@ 100 @,@ 000 acres ( 4 @,@ 500 km2 ) along over 125 miles ( 201 km ) of the Missouri River , centering on Fort Peck Lake , comprise the Charles M. Russell National Wildlife Refuge . The wildlife refuge consists of a native northern Great Plains ecosystem that has not been heavily affected by human development , except for the construction of Fort Peck Dam . Although there are few designated trails , the whole preserve is open to hiking and camping . 
 In north @-@ central Montana , some 1 @,@ 100 @,@ 000 acres ( 4 @,@ 500 km2 ) along over 125 miles ( 201 km ) of the Missouri River , centering on Fort Peck Lake , comprise the Charles M. Russell National Wildlife Refuge . The wildlife refuge <a href='uninflect' title='1'><mark>consists</mark></a> of a native northern Great Plains ecosystem <a href='null_relcl' title='2'><mark>that</mark></a><a href='been_done' title='3'><mark>has</mark></a> not been heavily affected by human development , except for the construction of Fort Peck Dam . Although <a href='dey_it' title='4'><mark>there</mark></a> are few designated trails , the whole preserve <a href='drop_aux' title='5'><mark>is</mark></a>open to hiking and camping . 
In north @-@ central Montana , some 1 @,@ 100 @,@ 000 acres ( 4 @,@ 500 km2 ) along over 125 miles ( 201 km ) of da Missouri River , centering on Fort Peck Lake , comprise tdaCharles M. Russell National Wildlife Refuge . The wildlife refuge consist of a native northern Great Plains ecosystem done not been heavily affected by human development , except fa the construction of Fort Peck Dam . Although it is few designated trails , the whole preserve open to hiking and camping .