Free

Castner Glacier ice cave (self-guided)

Conditional. Cave changes yearly and partially collapsed in 2022. Creek blocks access until it freezes, usually mid-Nov. Snowshoes needed. Rockfall and thin-ice hazards; a guide is recommended.

Where

Richardson Hwy near mile 217 to 218, south of Delta Junction, Fairbanks

When

Dec to Mar is best

Price

Free