It happened just before two this morning at a Comfort Suites on Clovis Avenue between Bullard and Sierra.
It is unclear how the tree caught on fire, but smoke made its way into the hotel and set off a smoke detector.
Firefighters evacuated the building as a precaution.
There was no fire in the building and everyone returned to their rooms.
Another tree partially burned.
The hotel sign was slightly burned.
No one was hurt.