Looking to do this starting either Friday 20th Aug or Sat 21st Aug.
I rode this at the weekend, on what I thought would be my last chance of decent weather before the dark nights draw in. I was certainly surprised by the wind which picked up on Sunday but I still managed to complete my SR for this season.
I parked for free in the Lakeside carpark near the Vue cinema, starting loop one (300km) at 8am with cafe stops at Goole Tesco, the Garden centre at Saundby (Rosie's is shut on Saturday afternoons) and another garden centre at East Bridgeford. After a petrol station at Caenby Corner, it was back to Doncaster where I managed 3 hours sleep in the back of the car.
Loop 2 is 160km to Great Gonerby and back. The route runs alongside the A1 in parts, and I was able to make good progress (into an increasingly strong head wind) by using the A1 itself which had very little traffic on it. I even got served at Markham Moor McDonalds drive-thru! After a full breakfast at Great Gonerby I had a welcome tail wind to return to Doncaster. By now the A1 was getting busier so I used the roads alongside.
Loop 3 is a 140km trip up to York, Ferrybridge and back. The ride into Ferrybridge services uses a rough bridlepath, but I wonder whether, with most traffic now bypassing this stretch of A1, using the A1 itself would be a better option.
This ride works well with no major climbing. It's as easy a 600 as you'll find.