Nearly 300,000 flight operations a year is considered very high for a single runway General aviation airport.

Pulled from the Palomar Airport Association site.

http://www.palomarairportassociation.com/index.php?module=pagemaster&PAGE_user_op=view_page&PAGE_id=25&MMN_position=63:63

FICTION-1: “…the airport isn’t that busy…”
FACT-1: Intensity: There IS a lot of aircraft ACTIVITY over this area today and it will increase. Palomar Airport is a VERY BUSY GA airport. In 1999 it had a peak of 292,000 operations–the busiest single runway airport in the nation. The airport is one of the busiest in the nation. Contributing factors in 1999 were 4 flight schools and increasing commercial aviation. The airport now has 5 flight schools, 2 flying clubs and 2 regularly scheduled airline services (FAA Part 121). In addition, Palomar is quickly becoming a major jet center for North County. Many of the factors that created peak airport demand are again in place and more……