1921 N Bicentennial Blvd, McAllen. (956) 681-4562. The Arbor Day Celebration is a fun-filled event where anyone can join us in a 5K/10K run, Kids 1 Mile Run, 25Mi/100K Bike Tour, or a Tree Workshop! All events commence at McAllen Municipal Park. There will be shirts, medals, free trees, and music.