The Royal Blue Regiment Marching Band competes in regional parade and field tournaments in the fall. Members of Wind Ensemble, Concert Band, Color Guard and Drumline participate in the Marching Band. Each year the Band, Color Guard, and Percussion sections receive numerous awards in their respective categories. The band also participates in the Mount Carmel Band Review, The Mira Mesa Band Review, The La Mesa Flag Day and The Annual Mother Goose Parade.
The Regiment's Competition achievements are listed below:
2016 Field Show Season
| Date | Location | Score | Place |
| 10/8 | Bonita Vista Field Tournament | 51.60 | 1st |
| 10/29 | Mt. Carmel | 49.60 | 4th |
| 11/5 | Mira Mesa | 53.40 | 2nd |
| 11/12 | Chula Vista Field Tournament | 61.17 | 4th |
Grossmont Royal Blue Regiment 2016 Field Show "Figaro's Final Folley"
2016 Parade Competitions
| Date | Location | Score | Place |
| 10/8 | Maytime Band Review | 81.35 | 4th |
| 10/29 | Mt. Carmel | 81.35 | 4th |
| 11/5 | Mira Mesa | --- | --- |
| 11/12 | Chula Vista Parade |
Grossmont Royal Blue Regiment Parade 2016 "The High School Cadets"
