I found a radio today at the top of Brown Mountain in Angeles National Forest.
Looks like a GRS type radio. The brand is Baofeng. There are 2 stickers on the front, one says the channel and the other has a number.
Let me know if this is yours!
I found the owner by checking the bikes serial number with the distributor of the brand of bike, thanks to the suggestion by Zomby Woof. The distributor contacted the owner and the owner contacted me and will pick it up today! And strangely enough, someone who saw the post I made on...