Forty-nine miles of highway between Yellowstone National Park's West Entrance and Mammoth Hot Springs opens exclusively to bicyclists on Thursday at 8 a.m.
There is no bicycle access to Old Faithful or Canyon until April 18.
No services are available along the roadway, and cyclists should expect to encounter some vehicles, changing weather conditions, wildlife such as bison and grizzly bears and stretches of snow-covered road.
Bicyclists are required to ride single file. They are strongly encouraged to carry bear spray and should be prepared to turn around and backtrack when encountering wildlife on the road.
Cyclists are urged to call 307-344-2107 from 8 a.m. to 4:30 p.m. on weekdays for updated road access information, or call 307-344-2113 for 24-hour weather information. Additional planning information is also available online at http://www.nps.gov/yell/planyourvisit/springbike.htm.