After diner I biked the following trip:

ATB Berg en Dal, Nijmegen at EveryTrail

I had to stop a few times because of some stomach ache (mountain biking after eating is a bad idea). So the average speed was 13 km/h...

So today I ate less and tried again (tried not to stop this time):

ATB Berg en Dal, Nijmegen at EveryTrail

16.9 km/h which is not bad considering all the climbing.

Note: there are some odd differences in vertical up/down. Probably due to only receiving two or three satellites (and not four).