He was there on the August 24, 2001 (at least).
From the White House web site:
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http://www.whitehouse.gov/news/releases/2001/08/20010825-2.html----------
President Gives Tour of Crawford Ranch
Remarks by the President During Tour of the President's Ranch
Prarie Chapel Ranch
Crawford, Texas
Q When you have those business meetings, like the Joint Chiefs briefing, do you like to keep it separate from the living quarters on the ranch?
THE PRESIDENT: Actually, you know, what we call the governor's house, the place where you all came out during the -- that's where we went. Condi and Karen Hughes stayed there. And right across the street from that is a -- it's a nice looking government doublewide. (Laughter.) And that's where the mil aide, the nurse, the WHCA head, the doc, they stay.
The CIA briefings, I have on our porch, the end of our porch looking out over the lake. When Tenet came up, that's where we visited, out there. You know, everybody wants to see the ranch, which I'm proud to show it off.
So George Tenet and I -- yesterday, we piled in the new nominees for the Chairman of the Joint Chiefs, the Vice Chairman and their wives and went right up the canyon.