This may be of interest to you.
- Municipality of Bornem: Useful information with, among others, addresses of hotels, event dates, and its history.
- Tourism in Klein-Brabant: You can find information about hikes in the region here.
- Wandelsport Vlaanderen VZW: Wandelsport Vlaanderen VZW has over 350 affiliated hiking clubs and over 60,000 members. It organises over 2000 events each year, joined by over 1,500,000 enthusiastic hikers. All hikes can be found in the ‘Walking in Belgium’ hike calendar. The training manual can be found here.
- The Four Days Marches of Nijmegen: The official site of the international Four Days Marches in Nijmegen.
- Sittard Kennedy March: Sittard Kennedy March, Netherlands (80 km).
- Someren Kennedy March: Someren Kennedy March, Netherlands (80 km).
- 50+ hikes calendar: This site offers a good overview of hikes and other active events.