Glad you asked, @StarLord2020. Depending on the model of Ring Doorbell you have, here is a general visual of how these devices detect motion. It might be possible for you to angle upwards and catch visitors as they approach the stairs, however, this may require some trial and error. Keep in mind that, while our Doorbells are weather resistant, this resistance is dependent on mounting in ways that are intended. To avoid any damage to your device, this unique solution would be best attempted if the area is covered. I hope this helps! 