Troy Hill, as you may have guessed, is a hill. The streets atop the hill are often long and narrow (a la photo 2) and the streets that lead up from the river valley are steep and hard as hell to bike up (photo 1).
I got into Troy Hill by taking Rialto St from East Ohio. I tried to be a hard-ass and bike up but that ended about 4 seconds later. Turns out that there actually ARE hard-asses out there who can tame this beast.