1The climb
From 16.7 km to 17.8 km
1.1 km · +78 m at 7.0% · 10.5 km/h · 162 bpm, peaking at 174
The climb at Brill pulled your heart rate significantly higher than the rest of the ride. Since this came just before the halfway point, pushing that hard suggests you were either testing your legs or misjudged the gradient.