I find watching scenes of people fishing by a river very relaxing. I hope I could try doing it one day too!
For my rough sketch, I tried drawing the outline of the river , but later decided to draw people first:

Then added the fishing poles and the boot things people wear when river-fishing:

I also decided that they would be fishing on a hot day and one of them would be sipping a cold fizzy drink:

Yes, he looks happy with the drink I gave him.
I drew some rocks peeping out of the water, and some waves especially at the base of the rocks, to give the effect of flowing water.

I draw the opposite bank and the sky next:

At this point, I was happy with the drawing.

But later tried shading their boots to see how it would look.

So that's my RIVER themed drawing for the #sketchdrawing contest. Thanks @sparkyez for posting it. :)