What would cause a 50 yr old Red Maple to die?
Montgomery County Maryland
It is impossible to say what killed your maple. There could have been a combination of factors, but high on the list would be those related to cultural/environmental issues, as opposed to anything concerning insects or disease.
Hig on the list of these factors include girdling roots, drought, being planted or mulched too deeply, etc.
If you are interested, here is our page about these possiblilities: