Lesson in Tiredness

18.5 miles on my mountain bike in 2 hours (Hey there were plenty of hills!).  It was a fun and challenging ride.  Best workout I’ve had in a long time.  It’s no running but the biking thing is sure catching on with me and I haven’t had a workout that hard since my insanity moment when I decided to go up Joplin Trail with a bike.
I’m tired.  And it feels good.