Beyond the tarn the valley comes to an end below Great Carrs / Swirl How.
A little further up our route, Andrew and I spent a couple of minutes deciding whether or not if would be realistic to come back someday and use Tarn Head Beck as a route from the valley to the ridge near Grey Friar. A definite possibility as it turned out, and one to try in the future.
Over the years, several people have asked me how I know what the more obscure off path routes I take are going to turn out like. You have two options really, the first one is to ask someone who's done it before or failing that, you access the route before hand from a good vantage point; as we did today. Although I'm confident about where I am and where I'm going to end up, I don't just head into the unknown without giving it a bit of thought first.