There is more than one trail head to Klondike bluffs. It seemed to me that the better choice is to drive further north up 191 to the second turnoff. It's more central to the start of various trails. If you go to the trail head closest to Moab you ride towards the main group of trails on a very easy path (its a connector trail really). It does allow you to ride the whole of Dino flow down to finish though if that's what you're after. If you start at the lower trail head I'd go up little salty to get to the top of the other trails. It's steep and black in grade but very manageable for a blue level rider.