
Yes you can enter on the day!
I'm just back from the Grizedale event and it was a really good event. The weaher wasn't kind as it rained all day! There was seven of us there who knew each other, 5 of us set off to do the 45k, I was riding with ali and at 25k she decided she wasn't fit enough not a suprise as she's onoly been back riding about a month. I carried on when I got back the people told me I was the only one of our group who had completed the 45k, apparently a lot of people took the easy way out due to the weather. I really enjoyed the route though it was really well sign posted and mostly ridebale - and would have all been in the dry. Think I'll try and get to another of the events.