I have ridden Riga! A wonderful long climb out of Salisbury. At least when I rode it the road quality was very good. There are some great views but no real steep sections which is a bit of a bummer. If you ride Riga make sure to go up nearby Mt Everett , it’s a totally savage climb with panorama view from the summit. Alas, Everett is across the border in MA and therefore ineligible to appear on this blog 😔.