I went in January when it was pretty darn cold (21), but sunny. Some places had 8 inches of snow, but the hike was still very cool. I hiked up to the top of O'Leary's Peak! Very cool, but strenuous. The grade was 11% and pretty snowy at times, but still fun. The view from the top was amazing. I saw all the cinder cones from the top and the view of the San Francisco mountains was to die for. The visitor center was pretty cool and informative also.
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