My favorite tree

Every year this tree flowers in a profusion of pink.  I drive by, bike by, and rollerblade by, thinking I should photograph it...if only I had a camera on me.  Now mind you, I live approx. three minutes away.  Yet every year, I miss it.  Well, not this time!  I had my gear in the car, and a moment to stop.  Do you know where this is?  The tree's trunk is covered in spikes: beautiful, yet untouchable.