Arapahoe Basin is the last Colorado ski resort to close this year. Yesterday was the final day of the season with what ski area officials say should be the area’s third-best year for skier visits. A-Basin spokeswoman said skier visits will be down from last season, mainly due to a lack of snow from January to March. Heavier snow arrived in April and May. Last year was the second- best season for A-Basin, behind the record 430,897 skier visits in the 2007-08 season.