This depends on the year and model of your Honda Pilot. Check your Owner's manual that goes with the vehicle..
Honda recommends @ 45k miles and then every 30k miles after that.
15000 miles
Every 100,000 miles
I recommend every 5,000 miles.
I recommend every 75,000 miles.
after 15,000 to 20,000 miles
Every 3000 miles recommended.
Honda recommends changing it at 100,000 miles. I personally recommend you change it every 75,000 miles. The 2003 Honda Accord had problems with the transmission so I would recommend this as a preventative measure.
I have done quite a bit of research on this because there is competing advise. The Honda manual says 105,000 miles; others say any time you are over 75,000 miles. Overall, given the significant damage a broken timing belt can cause, it seems likely that an earlier timing belt change is better, perhaps when you have your regular service over 75,000 miles.
My recommendation is every 5,000 miles change the oil & filter.
You can follow the instructions in your owner's manual or change it every 50,000 miles.
every 3000-5000 miles, but your owners manual should tell you exactly what Honda recommends