You can only transfer from Amtrak to CO if you have Amtrak Select or Select Plus status. The Amtrak web site says:
For our top-earning members, we have created Select and Select Plus to recognize and thank you for your loyalty. Select level begins at 5,000 earned rail points (per calendar year); 10,000 rail points in a calendar year will get you into our top level, Select Plus.
The option to redeem Amtrak Guest Rewards points for airline miles, hotel points, Audience Rewards and experiential rewards is only available to the following members with the associated annual point transfer caps:
Members with current Amtrak Guest Rewards Select or Select Plus™ status, with an annual point transfer limit of 50,000
Cardholders of the Amtrak Guest Rewards MasterCard® issued by Chase Bank with an Amtrak travel spend on the card of over $200 per calendar year, with an annual point transfer limit of 25,000 per year
I assume that earned rail points means just that, points earned from rail travel not by a transfer from elsewhere. Has anyone done this as I need 15000 CO miles and I have no place to get them from except SPG. Also how long do the two transfers take?