The snowboarder was traveling in a remote area about 50 miles west of Denver when the avalanche occurred around 9:30 am, local time (11 am ET).
The avalanche occurred on an east-facing slope east of Mount Trelease at an altitude of more than 12,000 feet, said the preliminary CAIC report.
Search and rescue personnel found the victim buried in the wreckage of the avalanche, according to CAIC.
About 50 miles north, a snowmobiler was caught and killed in a second avalanche west of the Rollins Pass on Mount Epworth on Sunday, CAIC reported.
The avalanche took place on an east-facing slope, above the tree line, burying the snowmobiler under his sled at Lake Pumphouse.
Colorado saw six avalanche deaths this month alone for a total of ten this season, more than any other state according to the CAIC count.
In December, three inland skiers were killed in two avalanches a day.
Nikki Champion, an analyst at downtown Utah Avalanche, told CNN earlier this month that the deadly season could be the result of two reasons – people enjoying more time outdoors and a “really dangerous layer of snow”.
This year’s avalanche season was probably more active because of a “weak, persistent layer” of snow, she said.
CNN’s Keith Allen contributed to this report.