100,000 2018 Ridgeline service
 

My dealer in Spokane Washington is quoting just north $3000 for 100,000 mile service. This seems excessive.

welcome to the forum. I would suggest you find a repair shop that works on Hondas and get an estimate from them. make sure they are 4-5 star rated. Or ask your friends of good repair shops. dealers are expensive due to the enormous overhead they have, which has to be passed on to the consumer. good rated repair shops do just as good or better work at a reasonable rate.