I reckon 15 minutes is about right. I rode the full course and it was a climb to the 2nd carpark and a longish piece of singletrack incluing an off camber piece around the lake edge.
Amazing trails, great day and what about the weather! Really looking forward to racing now and especially the K-Cup semi-marathon series. With trails like this it will be deadly!
Suffered last night for it though. The lungs were in bits. Coughing up blood by bedtime. Hardcore!