Extremely unfamiliar traction on Glenfinnan Viaduct! 50049 Defiance on the front & 50031 Hood on the rear slowly traverse Robert MacAlpine's concrete masterpiece with the Pathfinder Tours 1Z23 10:20 Forth William to Mallaig 'Monarch of the Glen' railtour on 5 March 2005. This was the second day of the tour, but I hadn't bothered with the trip up the WCML the previous day, as the West Highlands were what the tour was all about.