What year is he? If he is a ‘24 D3 coaches are in the thick of getting that class sorted out and likely focused on their top recruits.
This thread is SO long, but despite being about swimming, a lot of the information will translate to XC since both are time based sports.
Most coaches will still meet with you if you are on campus though. Make sure you write Visit - (date)? On the subject. Also make sure to CC any assistant coaches if there are any. Do this for all communications.