Green river is reputed to be one of the best trout streams in the world with indisputably the largest trout population per mile... 20,000! Learn about all 25 miles of the river. 60 min. The Green river is reputed to be one of the best trout streams in the world with indisputably the largest trout population per mile... 20,000! If you put them end to end they would stretch easily the entire 7 mile length of "Section A". Dennis Breer... Trout Creek Outfitters has been fishing the Green for the last 10 years and knows the Green like the back of his hand. Learn all of 25 miles of river... Not just the very popular "Section A"... From the REAL experts... The guides who fish it every day. During October we fished successfully everything from size 22 midge larvae, size 14 and size 10 royal wulffs, to large woolly buggers on sink tip lines.