Jackson Hole Art Auction, Robert Lougheed, Open Range Encounter, oil, 30 x 60. Estimate: $40,000-$60,000. ← Previous Next → Jackson Hole Art Auction, Robert Lougheed, Open Range Encounter, oil, 30 x 60. Estimate: $40,000-$60,000. Jackson Hole Art Auction, Robert Lougheed, Open Range Encounter, oil, 30 x 60. Estimate: $40,000-$60,000.