Outdoor PitstopWalking route · Altena · Water Line Trail - 21 · Updated on 6 November 2026
Waterliniepad - 21 walk
Waterliniepad - 21 is a walk of 12.8 km from Altena. Along the way you'll find 73 benches and picnic tables, 4 water fountains and refill points and 2 public toilets.
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The route step by step
From start to finish, with what you pass along the way and the distance in between.
- 12.8 km
- ± 2:50 h
- ↑ 6 m · ↓ 6 m
- Moderate
- From A to B
- National route
Start in Altena
0 km6.8 km · 11 benches
Public toilet
6.8 km3.6 km · 30 benches
Groothoofdspoort
10.4 kmAttraction · Audio story · 2 min
177 m · 2 benches
Water point
10.6 km404 m · bench
Schroevendok Straatman and 2 more
11 kmDirk IV Graaf van Holland and Museum 1940-1945
160 m · 6 benches
Museum Mr. Simon Van Gijn
11.1 kmMuseum
288 m · 5 benches
Water point
11.4 km215 m · 4 benches
Attraction · Audio story · 2 min
388 m
Gebroeders de Witt
12 kmMemorial
167 m · bench
Water point
12.2 km651 m · 13 benches
Finish
12.8 kmAt the finish: public toilet and water point.
Longest stretch without a toilet: 6.8 kmBetween 0 km and 6.8 km there is no public toilet within 100 m of the route.
The route with the pitstops and sights within 100 m of it.
7 sights along the way
In the order you pass them. With the Outdoor Pitstop app you hear their story on the spot.
- Audio story · 2 min
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Photo: Wikimedia Commons · Wikimedia Commons · CC BY-SA 3.0View the photo on Wikimedia CommonsGroothoofdspoort
Attraction · after 10.4 km
Schroevendok Straatman
Attraction · after 11 km
Memorial · after 11 km
Museum 1940-1945
Museum · after 11.1 km
Museum Mr. Simon Van Gijn
Museum · after 11.1 km
Audio story · 2 mini
Photo: Michiel Verbeek · Wikimedia Commons · CC BY-SA 3.0View the photo on Wikimedia CommonsGrote of Onze-Lieve-Vrouwekerk
Attraction · after 11.6 km
StoryGebroeders de Witt
Memorial · after 12 km
Elevation and terrain
- Up
- ↑ 6 m
- Down
- ↓ 6 m
- Highest point
- 5 m
- Lowest point
- -1 m
- 2 stairs
Elevation from AHN (Rijkswaterstaat), smoothed.
Way types
12.8 km in total- Road: 4.1 km
- Footpath: 3.2 km
- Path: 2.4 km
- Street: 1.5 km
- Cycleway: 700 m
- Busy road: 125 m
- Stairs: 2 stairs
- Track: 75 m
- Unknown: 600 m
Surfaces
12.8 km in total- Asphalt: 3.8 km
- Paved: 2.9 km
- Natural: 2.4 km
- Unknown: 3.7 km
About the walking route Waterliniepad - 21
Updated on 6 November 2026, with data from OpenStreetMap and the AHN.
Where do you walk?
Waterliniepad - 21 is a walking route of 12.8 km that starts in Altena. It does not end where it starts. You start in Brabantse Oever and finish in Dordrecht. Along the way you pass Groothoofdspoort (after 10.4 km), Schroevendok Straatman (after 11 km) and Dirk IV Graaf van Holland (after 11 km).
How hard is the route?
The route is almost flat. You climb 6 m in total and descend 6 m. There are 2 flights of steps along the way. Allow ± 2:50 h, without breaks. The level is moderate.
What paths do you walk on?
The longest part is road (4.1 km), footpath (3.2 km) and path (2.4 km). Of the surface, 3.8 km asphalt and 2.9 km paved. For 3.7 km the surface is not known.
Pitstops along the way
Within 100 metres of the route there are 73 benches and picnic tables, 4 water fountains and refill points and 2 public toilets. You can fill your bottle after 10.6 km, after 11.4 km, after 12.2 km and at the finish. The longest stretch without a toilet is 6.8 km. The Outdoor Pitstop app navigates you there.
Part of Waterliniepad (Water Line Trail)
Website of the routeWalks nearby
6Sights nearby
Within 10 km of the route, best known first.
- 1
Dordrechts MuseumMuseum · 321 m from the route - 2
Nationaal BaggermuseumMuseum · 2.6 km from the route - 3
Fort bij het SteurgatFort · 7.3 km from the route - 4
BinnenvaartmuseumMuseum · 123 m from the route - 5
Museum De Koperen KnopMuseum · 7.7 km from the route - 6
Kasteel CrabbehoffCastle · 1.8 km from the route - 7
Museum Johannes PostschoolMuseum · 6 km from the route - 8
Huis van ZessenMuseum · 6.4 km from the route - 9
Museum Het Hof van NLDMuseum · 323 m from the route - 10
CastleCastle · 976 m from the route - 11
Biesbosch MuseumEilandMuseum · 2.3 km from the route - 12
Werk aan de BakkerskilFort · 10 km from the route - 13
Korenmolen De LelieAttraction · 5.9 km from the route - 14
GiessenburgRuins · 9.5 km from the route - 15
VredesmonumentMemorial · 7.4 km from the route - 16LevensboomMemorial · 546 m from the route
- 17Observation towerObservation tower · 1.9 km from the route
- 18Observation towerObservation tower · 6 km from the route
- 19Observation towerObservation tower · 7.4 km from the route
- 20Observation towerObservation tower · 8.9 km from the route
- 21Observation towerObservation tower · 9.6 km from the route
- 22Observation towerObservation tower · 9.7 km from the route
Explore more
Frequently asked questions
How long is Waterliniepad - 21?
Waterliniepad - 21 is 12.8 km long. Allow ± 2:50 h of walking: 4.5 km an hour and 10 minutes more per 100 metres of climbing, without breaks.
Is this route a circular walk?
No, the route runs from Brabantse Oever to Dordrecht.
Where does this route start?
The route starts in Altena.
How hard is this route?
Moderate, with 6 m of climbing.
Are there toilets along this route?
Yes, there are 2 public toilets within 100 m of the route. The longest stretch without a toilet is 6.8 km.
Can you fill up with water along this route?
Yes, there are 4 water fountains and refill points within 100 m of the route.
What is there to see along this route?
Along the way you pass Groothoofdspoort, Schroevendok Straatman and Dirk IV Graaf van Holland.
Starting point
More routes from this place
Route data © OpenStreetMap contributors
