It depends on whether you are a DO or MD.
If you are an MD, there is the annual Resident/Student national conference in Kansas City, MO, in July. There is also the AAFP Scientific Assembly in September, which is phenomenal.
If you are an MD, you can attend the two above plus the OMED conference, which is non-FM specific. There is also the ACOFP conference every March.
Those are the ones I know about.