Strewn (v.)
scatter or spread (things) untidily over a surface or area
On Merriam Webster, meaning ‘to spread by scattering’,I found this word in the passage “What If You Could Choose Between the Fastest Route and the Most Beautiful?”by Lex Berko,
“…but the route itself might make for a garbage-strewn, treeless journey.”
so what the author means is that the route you’re forced to take, using a mapping app, might get you a path littered with trash