Take Highway#2, south from Calgary (or North from Lethbridge) to Nanton. Secondary Highway #533 West intersects Nanton at the south edge of town. Turn West on Highway 533.
Drive for about 5-6 kilometers and look for the Range Road #290 Sign. Turn south (or left) and at the next intersection, Basin Road. Drive about 10 miles on Basin Road until you reach the top of the hill (don't worry about the odd jog west) and can see the radio towers (on your left at the top).
You'll see the road Y's at this point - don't turn here - stay right on the main road west until on the top and you cross the second Texas gate. Then you'll notice a left turn just ahead offering a southern downhill road - take this - it's sign reads Beaver Valley Road (Range Rd 292) We are the house on your right at the bottom of the hill. Blue sign at the gate reads 292011 Beaver Valley Road.
