CREATE TABLE table_18035 ("Week" FLOAT, "Date" CLOB, "Opponent" CLOB, "Result" CLOB, "Game site" CLOB, "Record" CLOB, "Attendance" FLOAT)

What team was the opponent at Mile High Stadium?
SELECT "Opponent" FROM table_18035 WHERE "Game site" = 'Mile High Stadium'
SELECT "Opponent" FROM "table_18035" WHERE "Game site" = 'Mile High Stadium'