[Mick]

What was the last Stanford football game played at Stanford Stadium with at least 60,000 fans? 
What was the last Stanford football game played at Stanford Stadium with at least 70,000 fans? 
What was the last Stanford football game played at Stanford Stadium with at least 80,000 fans?

I'm guessing one has to be Big Game in 2005.

That was the last game at Stanford Stadium with over 70k fans. On 11/19/05, Stanford lost to cal in front of 71,743 fans. 

Big Game in 2001 had 71,750 fans. The home game vs. UCLA that year had 64,950 fans.

The last game at Stanford Stadium with over 80,000 fans was Big Game, 1999, the Rose Bowl season. On 11/20/99, 80,746 fans watched Stanford beat Cal, 31-13. Stanford would defeat Notre Dame the next week at Stanford, 40-37 in front of 58k.

[Mick]

What was the last Stanford football game played at Stanford Stadium with at least 60,000 fans? 
What was the last Stanford football game played at Stanford Stadium with at least 70,000 fans? 
What was the last Stanford football game played at Stanford Stadium with at least 80,000 fans?

I'm guessing one has to be Big Game in 2005.

That was the last game at Stanford Stadium with over 70k fans. On 11/19/05, Stanford lost to cal in front of 71,743 fans. 

Big Game in 2001 had 71,750 fans. The home game vs. UCLA that year had 64,950 fans.

The last game at Stanford Stadium with over 80,000 fans was Big Game, 1999, the Rose Bowl season. On 11/20/99, 80,746 fans watched Stanford beat Cal, 31-13. Stanford would defeat Notre Dame the next week at Stanford, 40-37 in front of 58k.