The Cobb has a seriously steep run from below the Cobb reservoir. Walk down to the junction with Daimond lake stream. A short warm up and your world will change drastically. Three hours of 50m/km with only a few portages drops into 100m/km and plenty of scouting and portaging. It then sits down (?) to 50m/km again to the Cobb Powerhouse. It needs a strong team with good communication skills.