By Forrest Whitman One of Colorado’s most spectacular train trips is back after three and a half years of rehabilitation. It’s a good time to board the Cog Railway from Manitou Springs to Pike’s Peak. The day we went, the weather was fine and the snow mostly gone. We did see moisture on the new bright red snow plow car. Started in 1891, the hour and ten minute trip each way has become an icon. Up the steepest ruling grade in North America, the whole line is an engineering marvel. It’s nine miles of unforgettable scenery is now a better…