The back tees at our club are 7500 and that is at sea level. But I see guys coming to the course as guests and they want to play the tips. That means a steady diet of 450 yard par fours including two at 500. I am 66 years old and a four hdcp. I play at either 7000 or 6700, depending on who I am playing with. I don't go near the tips any longer.