is the riverside location closed? I can't get a reservation from los angeles to riverside, ca. if ir is closed, what's the nearest location to be after riverside?

Riverside Greyhound has been shut down by the city

Yes.. that is correct. The city wanted greyhound not to continue there as i have heard.

San Bernardino is 12 miles away...

Yes Its been closed for almost a year now. Closest would be San Bernardino