No clue, sorry
I don't know about latest check in time. Call. The owner/operators treated me just fine. They were helpful in giving me guidance about a couple of dinner possibilities. The entrance is wicked steep and has an opposite camber. It looks like the planners had a difficult time fitting the structure to the lot. This a budget hotel. My emphasis was on low cost. I've stayed in better RR Inns. If your expectations aren't too high, it will provide you with a clean, sound sleep.
If you let them know you are going to late, they will work with you. if you are ridding a motorcycle, be very careful on the entrance way, it is very steep and slanted. Even the parking area is tricky.
I have no idea and after the way we were so rudely treated when simply calling to find out about this place I would never stay there nor would I ever recommend this place to anyone who wants and expects to be treated in at least a civil manner - many other options in the area where you are treated better than we were.
We checked in at 10:30-ish at night with no issues.
Get an answer from Red Roof Inn Chattanooga - Lookout Mountain staff and past guests.