Mountain biking is king at Purgatory. (Purgatory/Facebook)

As Durango businessman James Coleman bought five southwest Rockies resorts, he promised to put significant money into improvements at these mountains in Colorado, New Mexico and Arizona.

He’s done just that in his first three years of ownership, and continues to do so this offseason. Here’s a look at what’s going on. 

Purgatory. For the summer, construction is underway on a 4,000-foot long mountain coaster with a drop of 300 feet. The coaster, which will run in summer and winter, will be north of the Twilight Lift 4 that starts at the base. The southwestern Colorado resort also added tubing and a large airbag for the summer. This winter, expect to see new intermediate and expert trails – some with glades -- and a new midway loading station on Lift 6.

New lift coming at Arizona Snowbowl. (Arizona Snowbowl/Facebook)

Arizona Snowbowl. Ownership is putting out for the third lift in three years – a new quad fixed-grip chair on Hart Prairie beginner area to replace the existing 36-year-old two-seater. Loading conveyor will make getting on easier.

Prime trout fishing at Sipapu. (Sipapu/Facebook)

Sipapu. The day lodge at the Northern New Mexico resort gets larger for next season as construction is underway to add 2,141 square feet to the main base location. Expansion includes a new rental shop with upgraded ski and snowboard rental equipment, a ticket office, retail space, new bathrooms and locker room.

Rampin' it up at Pajarito this summer. (Pajarito/Facebook)

Pajarito. A pass for unlimited rides up the lift for mountain bikers is now available at the New Mexico day mountain above Los Alamos. Crews continue to upgrade snowmaking and thinning out trees that were damaged by recent wildfires.

Summertime at Ski Hesperus. (Ski Hesperus/Facebook)

Ski Hesperus. Purchased last year, this town hill outside of Durango will reopen its base rope tow, upgrade and add the on-slope lighting for night skiing and riding, and revamp its rental shop.

Skiers and riders can purchase the Power Pass that allows unlimited skiing and riding at all five mountains.