Sidelines
The West Virginia sideline is located in front of sections 124-127. The opposing sideline is in front of sections 104-107.
Club Seating
The Touchdown Terrace Club is located behind the North endzone. This section offers chair-back seating, access to the club lounge, concession options, and private restrooms.
Best Seats
If you're looking for a great view on the 50 yard line you'll want to sit in sections 105-106 or 125-126. They're right behind the team benches on the lower level keeping you close to the action.
Mountaineer Field at Milan Puskar Stadium Seat Numbers
The standard sports stadium is set up so that seat number 1 is closer to the preceding section. For example seat 1 in section "5" would be on the aisle next to section "4" and the highest seat number in section "5" would be on the aisle next to section "6". For theaters and amphitheaters (i.e. venues that don't have sections around the entire stage) seat numbers follow a different logic. Instead the lower numbered seats are typically closer to the center of the stage while higher seat numbers are further from the center of the stage.