1The climb
From 16.7 km to 18.2 km
1.5 km · +90 m at 6.0% · 12.2 km/h · 163 bpm, peaking at 173
The drag up out of Brill pulled your heart rate up to where it stayed above your all-day pace for the whole climb, which is the load you were carrying rather than anything to worry about.