As for elevation profile, the 150k lists about 5800 ft of climbs. The largest hills are around 450 ft of climb and probably close to a 12% grade. The overall total is made up about half by these comparatively longer climbs and the rest is about 100 ft rollers. IMO it is a somewhat difficult ride but mainly the degree of stress is sometimes added to by the heat and humidity.

Hills are more punchy than a long western climb at 7% if that’s what you are used to. But there is usually a short downhill to recover with.

If you want to manage it well then I suggest a bike with triple style low gears. I have done it on a regular, compact, and triple and there is no shame in riding with the triple. It keeps you fresh for the few flat spots of the route.

Now ot if you want a crazy punishing ride then stick around until the next weekend and ride the Sadistic Century in Menomonie Wi. That’s what is in the photos