Lost bright green tree frog named Hop near a park in Susanville, California with a white belly and tiny spots.

I lost my bright green tree frog, named Hop, while taking a walk in the park near Susanville. He managed to jump out of my hand while I was trying to show him to a friend, and I haven't seen him since. He is quite small, about the size of a tennis ball, and has a white belly with tiny spots. I'm really worried about him being out there, so if anyone has found him, please let me know!