Set a turnaround time before the interesting part

Turning back is easiest to agree on before the viewpoint is almost visible. Once you have invested effort in getting there, another bend can sound harmless even when the day is slipping away.

Choose a return plan that accounts for the route, the group, daylight and changing conditions. The time limit is one part of that plan; weather, fatigue or an unexpected obstacle can be reasons to turn around earlier.

Tell companions what you have agreed and make sure everyone can speak up. A quiet person at the back should not have to persuade the whole group that a concern is legitimate.

When the agreed point arrives, follow the plan. You can record where you stopped and use that information for a better-prepared return visit. The path will not become more rewarding because you reached its end late, worried about the journey back. Coming home with room to spare leaves the next outing much easier to look forward to.