Tanning your face..

Okay, so I'm not the whitest thing, nor the darkest... I can tan easily or it can take forever... When I burn, I burn, sometimes I don't burn at all.. Sometimes it's gone within a day or two.. Sometimes it takes a week+.. I don't know why I wasn't blessed with natural dark skin... But anyways, it seems like my body burns/tans so easy compared to my face!! I floated the river 5 1/2 hours yesterday & everywhere got sun EXCEPT my face. I'm seriously burnt everywhere, & my face is still the same.. My face is rather pale (considering it won't tan)... I didn't wear makeup at all.. Does anyone else have this problem? Anyone know any tricks to help tan my face?