What is the ruling on vowing to walk to a location outside the Haram, such as Arafat or the designated Meeqats (points of Ihram)?

Primary text

If a person vows to walk to a location outside the Haram, such as Arafat or the Meeqats, no obligation is incurred, and the vow is treated as a vow concerning a permissible act (Mubah).