Canyoneering Moffat Style.... A westbound climbs up the 2% grade above South Boulder Creek. This location is between Tunnel 27 and Tunnel 29. The scar on the mountainside is daylighted Tunnel 28. The train could barely be heard over the rushing spring run-off until the locomotives were almost in sight..... Nature and Man put on quite the show of sound, as water and EMD prime movers are funneled thru the narrow defile.....