Trumpetjock
Orchestral Trumpet Resources
Section Orchestral Excerpts for Trumpet - by Dave Bamonte
Quite possibly the most incredible collection of orchestral trumpet section playing I've ever heard. Style, intonation, tone, articulation, precision...WOW! Led by Dave Bamonte (Oregon Symphony) and Recorded in Vancouver, Washington this recording features Bamonte, Manny Laureano (Minnesota Orchestra), Matthew Sonneborn (Naples Philharmonic) and Jeffrey Work (Oregon Symphony).
TrumpetExcerpts.Org
This is a great site! There are tons of the most well-known (most requested) orchestral excerpts for trumpet auditions. They are listed by composer and include not only the excerpts themselves, but also multiple recordings from different orchestras and conductors across the globe. Some are great, some, not so much, but they are all excellent as resources as you are practicing!
OrchestraExcerpts.Com
This looks like a great resource for many instruments. I've linked the TRUMPET excerpts on the button below. Let me know if you have feedback.