DENVER — Colorado's health insurance exchange is joining the national sprint to get people signed up by the end of the day.

People who don't have health insurance by April 1, or who haven't applied for it, face federal fines.

Colorado has already exceeded baseline federal goals for enrollment through its state-run insurance exchange, called Connect For Health Colorado, but Colorado hasn't met its most ambitious goals and hopes to enroll walk-in customers at special storefronts and online by the end of the day.

As of last week, 106,000 Coloradans had signed up for private insurance since the exchange opened in October. Another 151,000 had enrolled in Medicaid.

CNN reported Monday that in the early-morning hours of the final day of open enrollment, the government’s health care website experienced technical problems as troubleshooters worked on a “software bug,” a senior administration official said.

“System isn’t available at the moment. We’re currently performing maintenance,” the message on said.