Lost single key on a pink plastic tab keyring

I lost a single key on a pink plastic tab keyring on Wednesday, February 19th, while on a bike ride from Mount Pleasant to UBC via Kitsilano (10th and 8th then 4th via Spanish Banks) and back along 16th Ave. The keyring has some emotional value, so I’d be willing to offer a small reward and would be really grateful for you returning it to me. Thanks!