jump-off
US /ˈdʒʌmp.ɔːf/
UK /ˈdʒʌmp.ɔːf/

1.
a starting point or place for an activity or journey
:
•
The old pier served as a perfect jump-off point for our fishing trip.
•
This small town is a great jump-off for exploring the national park.
a starting point or place for an activity or journey