Fubar
Legendary Member
I looked at the map but couldn't make much sense of it - going to print it off when back at work! So, erm, how steep is Dukes Pass?
Never done it personally, just know it by, erm reputation.
http://www.owenphilipson.com/blog/2011/05/14/scottish-climbs-dukes-pass/ (I particularly like: "Dukes is a meaty climb that you can really get your teeth into")
As with any sportive just take your time and grind it out - you'll be fine!