All set for a long day of riding Saturday, what do I find when I go to load my mountain bike in the car?  2 flat tires.  Instantly I realized it was the thorn bushes I had read about from my ride at  Hewen’s creek.  Ugh.  Changed one after finding a nice thorn puncture.  The other wasn’t completely flat and I couldn’t find a hole, so just left it in place to see what it did.  After that fun delay off to Island Lake.  After one lap of the Blue trail I wasn’t happy.  Derailer was once again shifting like crap.  After checking my tires again in the parking lot found that the one was still leaking, decided to replace it.  Ended up blowing up the new tube (tire bead slipped off) so decided to just call it a day.  Sometimes its best to just cut your losses.