Bass fishing lower and upper end of lake?

Question

what do they mean by lower end of lake and upper end of lake?

Answer 1

My interpretation:

lower = near the dam, if one is present

Answer 2

Lower means low area,more open grounds,flatter,more water,deeper.Upper means higher,uneven grounds,less water,streams,higher currents,narrower water area,less weeds,more foliage,harder to cast when there r opposing winds with currents always going down to lower area,lots of pools,breeding grounds/nursery.