Half marathon between E19 and Zenne (Weerde Vilvoorde)

Half marathon along flat, traffic-free/low streets (exactly 21.1 km).
Start at Café SchoonZicht opposite the church in Weerde (where you can also enjoy some refreshments afterwards).
Start heading south along the old stone road from Weerde to Elewijt. The following places will be passed through:
Rubenskasteel;
along the Houtembos;
Witte Kinderbos;
Geboortebos Vilvoorde;
Schoewever with cycle/pedestrian bridge over the Woluwelaan;
Park in Far-West next to the railway line;
Path along the Zenne from Vilvoorde to Eppegem (Radiatorenstraat);
Plasstraat Eppegem Weerde to the old Zenne;
Weerdemolen on the Zenne bank path;
Gildestaat and Vogelzang;
Northern bank path shortening Zenne;
Once the Zenne shortening is crossed right, you cross three times over 200 m under the Weerde-Mechelen and Weerde-Hofstade rail lines; after the third crossing, follow immediately left of the railway line to the Angelsee;
Ketelveldweg around the Angelsee Weerde;
Ketelstraat to the starting point at the church in Weerde.

Directly after Rubenskasteel, you have 300 m of unpaved forest path. Then cross the road and follow Grensstraat (in concrete paving) until just before the right turn to the E19. Before this curve, turn right into Driestenbosstraat. At the end, you go through a few houses, then you have unpaved path for the second time over 600 m (along Houtembos, Witte Kinderbos, Geboortebos). Do not follow the wooden stilts there, as this area is only dry in the summer.
There is also 500 m of paved path (mainly the transverse path to Schoewever). The rest is asphalted and thus very walkable!
Surely 9/10 are traffic-free, the rest is low traffic.

Another half marathon (between Zenne and Willebroekse vaart (Canal Brussels Willebrook))? See https://www.routeyou.com/route/view/413122/wandelroute-halve-marathon-tussen-zenne-en-willebroeksevaart-weerde-grimbergen.nl

Want to run a marathon? Start in Eppegem (or Zemst at the Zenne shortening) and run both loops consecutively. Essentially traffic-free and asphalted terrain in the great outdoors.