This route takes the you up to the radio mast station on the hill top just east of St Katherine's - Grenada's highest point. It's concrete all the way to the top and must be the highest piece of paved road on the island too. It must be the steepest too. Last km averages 25% but there are decent sections well over 30%. The GPS gave a top reading of 44%! I didn't manage to ride up this - the descent is very hairy too. But it's a great climb with brilliant views that just get better as you get higher. At the top there is a ridge hiking trail to St Katherine's. Short sections are off road and muddy. Total ascent 1,900ft