Amtrak trains do go from Denver Colorado to Grand Junction Colorado but only one Amtrak Train is scheduled per day for the trip from Denver Colorado to Grand Junction Colorado.
Tickets for Amtrak Trains from Denver Colorado to Grand Junction Colorado are from $43.00 to $68.18 depending on how many people are traveling with you on the train and whether you buy the Amtrak Tickets ahead of time or wait until you get to the Amtrak Train Station to buy the tickets.
Buying the Amtrak Tickets beforehand is usually cheaper than buying the Amtrak Tickets as soon as you get to the Amtrak Train Station.