The summer before 11th grade is the EXPLORE college campuses window. Not early at all.
My 18 yo nephew was admitted to the Scholars Program at the U of Maryland at College Park - he and his mom just attended the 2 day summer orientation (past Thurs & Fri) - separate lectures for son on both days; mom went only on Thurs. The kids even had a sleep over in their un-cool dorm rooms (no a/c at 103F). He was not admitted to the MORE prestigious Presidential Program, but his PIA friend who I could not stand, was. Nephew's program included the separate dorm and a 2 year on campus housing promise. Presidential Program attendees get 4 year dorm promise in the twin dorm next to my nephew's dorm.
Nephew looked at CM and Pitt, too. And U of P. Was admitted to Lehigh, Va Tech, and U of Maryland. He graduated HS with 45 college credits due to his AP classes & test scores. Oh, did I mention his 800 SAT in Math and his AP Level 2 Math 780?
Meanwhile, that PIA friend of his graduated #1 in the class(540+ kids), never got a grade lower than an A, took all the AP classes (more than nephew), and tested better on the SATs. He did NOT get into CM, U of P, Columbia (his must go to school), and a few others. Need I say, U of MD was NOT his 1st thru 4th choice. My sister liked PIA boy, the HS school like PIA => I detested the kid when I met him 18 months ago.
Getting into college is NOT the same game that it was when most of us went.
My best advice and words of wisdom from my sister - the helicoptoring MOM.
NETWORK. Network with the moms a year ahead of your son. Network with the moms of your son's classmates who already got a child in a school or major your son is interested in. Network with the parents' whose kids who go private high school.