Guided tour in California

Hi everyone,

Sorry if my post is not in the right place, I did not know where else to post.

I always dreamed of canyoneering but never had a chance to actually do it.

I will be in California in August and have been looking for options to do a guided trip in Sierra Nevada with no success.

Do you have any recommendations for a good tour company or guide with experience that will be able to make my dream come true?

Thank you for your help

Alex