Start at the river
Pick a publicly accessible point on the central promenade as your start and identify it on a map before leaving. Run the same stretch back to keep navigation simple. If you start near the central market, take a moment to locate a pedestrian crossing before heading for the water.
Decide where to turn
For a 30-minute outing, turn at 15 minutes only if the return is likely to take the same time. With a strong wind or busy crossings, turn earlier. Look up from your watch around path junctions and use any marked pedestrian side of the path.
Plan for interruptions
Treat this as a route idea rather than a surveyed course. Check local works and events before leaving, especially if the river is your only way home. A short repeat on an open stretch works just as well as trying to connect every riverside segment.