Split a long route at a useful stopping point
A long route is easier to judge when it has a useful intermediate stop.
A long route is easier to judge when it has a useful intermediate stop. Choose a place where you can reassess the next section without being committed to it.
Look for a public transport connection, an appropriate rest place or a clear junction with a shorter return. Check current access and operating hours. A scenic point with nowhere suitable to pause may be a fine destination but a poor place to make a complicated onward decision.
Give each section its own purpose
Name what you want from the first section and what would justify continuing. Perhaps the first is the walk to a market, while the second follows a longer waterfront route. If weather, energy or time changes, finishing after the market should still count as a coherent outing.
Keep the route notes separate enough that you can find the return from the midpoint. Include the correct direction and stop for public transport, not merely a line number. Consider luggage, surfaces and the needs of companions when deciding whether the split is practical.
At the midpoint, check conditions before continuing. Do not let the effort already spent become the only argument for the longer section. Splitting the route is useful precisely because it gives you a fresh decision. It turns a rigid itinerary into two manageable choices with a safe way back.