Replying to Skiing in Austria this summer + rentals

Alright im lookin for some info.
Ill be in Altenmarkt this summer for awhile and my parents said since they are gonna be going on a bike trip theyd let me ski if I found a place to go/transportation. So Altenmarkt is by Radstadt (i think thats what its called, altenmarkt is just a small town where Im related to every 3rd person), and I heard Dachstein had summer skiing but not really sure. So where is a good place to ski thats not super far away and also a place to get good rentals (cant bring my skis in the car were getting so id have to rent there). Any info is great and if anyones gonna be there in june i think itd be chill to ski with someone. Also is there any good DH biking + rentals in austria or is that all in germany and italy for the most part? Thanks alot guys.