Up to hike number 3 in the overview below, we used an old edition of this topoguide (3rd edition, 1999, published by the Walloon GR organisation). By the end of 2008 the booklet wasn't available anymore, but then we heard that a completely new edition had been planned.
Meanwhile we had completed the flemish part of the GR 12 trail and we were eager to continue the trail into Wallonia. We found a fellow hiker that was kind enough to lend us his copy of the old edition. We thank him for that, but had to learn the hard way that lots of changes in the trail had occured since that topoguide had been published. Furthermore, most of these changes weren't documented on the website of the Walloon GR organisation (probably awaiting the new edition).

We tried 3 hikes using the old edition, but finally decided it woud be better to wait for the new topoguide. It was published early december 2009. Starting with hike number 4 we used the new edition.

A few remarks about the new topoguide:

- The trail now starts just outside Grimbergen near the border between Flanders and the Brussels Capital region. That way the overlap with the Flemish topoguide becomes even more important: almost 50 km now.
Because we fully completed the Flemish topoguide, the overview of our hikes on the Walloon part of the trail only starts at Kasteelbrakel (Braine-le-Château).
- The Flemish topoguide provides a lot more background information about the trail as it crosses Brussels (up to Ukkel-Kalevoet). The Walloon topoguide simply refers to the GR BRU topoguide for additional information.

The new topoguide not only describes the Walloon part of the GR 12 trail. It also includes part of the GR 121 trail, and describes a liaison trail to GR 16, named GR 12C.

The map below shows an overview of the hikes we made based on the GR 12 topoguide.
Below the map you'll find the links to our reports on every hike.