Amtrak, the national passenger rail system, provides service to Denver, operating its "California Zephyr" multiple times every week in both directions between Chicago and Emeryville, California, across the bay from San Francisco. The service usually runs daily but due to the COVID-19 pandemic, the service was cut by Amtrak. Amtrak Thruway service operated by private bus companies links the Denver station with Rocky Mountain points. In 2017 the Colorado legislature reinvigorated studies of passenger rail service along the Front Range, potentially connecting Denver to Fort Collins and Pueblo, or further to Amtrak connections in Cheyenne, Wyoming and Trinidad.