A skier rides the lift on Corona Bowl, known for its extreme skiing, at Eldora Mountain Resort, near Nederland, Colo.

(AP Photo/Brennan Linsley)

Boulder County filed an objection Monday with the U.S. Forest Service over the proposed expansion of Eldora Mountain Resort.

The Forest Service gave an initial go-ahead to Eldora’s plan in March. The resort near Boulder wants to move outside its boundaries to the north and south in order to add ski lifts and trails. 

Boulder County filed a seven-page letter outlining issues with the environmental assessment process followed by the Forest Service. 

“There was a lack of analysis of some of the environmental impact, and also a lack of analysis on other alternatives that could be done that would have less impact on areas,” explained Michelle Krezek, the Boulder County commissioners’ deputy.

Specifically, Boulder County commissioners said that the resort’s needs can be met by working largely within existing boundaries. The resort says it needs the improvements to remain competitive with other ski resorts.