Use Castle Creek TH or Conundrum Creek TH.
The South Ridge from the Castle/Conundrum Saddle is the usual summer option and can also be done during snow season. The saddle into the basin is a speedy glissade!
Ascend to the Castle/Conundrum saddle. Those approaching from the Conundrum Creek TH pass mediocre Conundrum Hot Springs along the way. Fron the saddle it is a very short climb to the summit.
If you are there after the snow has melted expect steep scree on both sides of the saddle. Really this is only fun as a snow climb.
If you are looking for a better snow climb, try the Conundrum Couloir.
Descend your ascent route. Lots of good glissading. Glissading directly from the saddle has a person rocketing pretty fast. The run out is great.
Standard hiking gear outside of snow season. Ice ax and crampons when the saddle is snow covered.
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