5K races near Grez-Doiceau

La Course du Bois du Cazier begins at the Bois du Cazier in Charleroi, a UNESCO World Heritage site in Hainaut, Belgium. This event offers mixed road and trail running, with adult races around 6 km and 16 km, and children's runs of 500 meters and 1 km. The shorter adult course is just over 6 km, and the longer one is a little over 16 km, meaning the listed distances are approximate. The route departs the historic mining site, passing through Marcinelle via paved sections, slag heaps (terrils), and forest paths. Portions of the course overlook Charleroi, providing more variety than a typical city road race. The event accommodates both adults and children. Adult participants receive a bib, electronic timing, aid stations on the course and at the finish, a medal, and a raffle entry. Children get a bib, a snack at the finish, and a medal.

The STYREKX Fitness Race Mechelen is an indoor fitness competition in Mechelen, Antwerp province, Belgium, taking place in October. It combines short running circuits with functional exercise stations, resembling a timed gym challenge more than a typical road race. The primary Regular and Xtreme formats consist of ten 800-meter laps, totaling 8 km of running, with an exercise station following each lap. A shorter Light option features nine 400-meter runs. The event is part of the Strong Viking series and maintains an arena atmosphere, incorporating chip timing, designated stations, and a consistent run-exercise cadence. The course is constructed from repeating laps and gym-based exercises, distinct from outdoor obstacles or terrain. Stations involve equipment or activities such as RowErg, StrengthErg, Sled Push, and Loa, with exercises drawn from standard fitness and CrossFit routines. Participants can compete individually, in pairs, or as teams, and the organizer states prior fitness race experience is not required. Staff are stationed to guide participants through the exercises, and the timing chip tracks running, station completion, and transitions. Entry includes a STYREKX Patch, and finishers receive nutrition, a personalized results breakdown, and a certificate; facilities like changing rooms, a cloakroom, and a hydration station are also provided.

Corrida de Jodoigne is an October night road race held in Jodoigne, Walloon Brabant, Belgium. It crosses the town's historic center and features two primary distances: 5 km and 10 km. A 1.4 km children's run is also available for participants aged 6 to 12. The course has the organizer as surprising and somewhat technical, deviating from a simple flat run through town streets. The event accommodates various participants, from those aiming for a specific time to families and runners seeking a shorter evening race. Each distance has a participant limit of 500.

EnergyVision Dwars Door Hasselt is a city running event held in Hasselt, Limburg, offering race distances from a 1 km kids run to a 21.0975 km half marathon. It is known locally as Limburg’s coziest city run, yet it is also a significant event, with almost 14,000 runners participating in a recent edition, ranking it as the third largest running event in Flanders. The event features 3 km, 5 km, 10 km, 15 km, the half marathon, the Persil Kids Run, and a handbike race. The half marathon is officially measured and World Athletics-certified, attracting approximately 3,000 runners since its introduction. The children’s run is untimed, while the 3 km through half marathon races utilize chips to record net time from start to finish. Participants receive a commemorative medal, aid stations along the route and at the finish, changing rooms and showers at PXL, bag storage, and results published online and via Het Belang van Limburg’s digital newspaper.

La Gelbressoise is a small nature-running event in Gelbressée, near Namur in Belgium’s Ardennes region, held in November. Participants can select from 20 km, 12 km, and 5 km courses, accommodating those seeking a longer countryside run and those preferring a short local race. The three distances are managed as distinct events, with limits of 300 runners for the 20 km and 600 runners each for the 12 km and 5 km. Registration is exclusively online, without on-site sign-ups. The stated fees are 10 EUR for 20 km, 7 EUR for 12 km, and 5 EUR for 5 km, prior to additional registration charges.

Foulées Hivernales ART is a winter forest run in Watermael-Boitsfort, Belgium, starting at Collège Saint-Hubert. Participants can select either a 5 km or 12 km distance, both beginning in the morning. The event has a limit of 1,000 participants. Registration must be completed in advance; no race-day sign-ups are permitted. Each runner is assigned a time slot to collect their bib. The course is contained entirely within the Sonian Forest, presenting a compact trail-style event distinct from city road races. The return to the finish line retraces the initial path. A drink station is available on the 12 km course within the forest. ART Running Team organizes this event, part of its Foulées race series which includes a summer edition. The event also supports the Belgian Cardiology League.

Jogging de l'Athénée de Gembloux is an evening street race held in Gembloux, organized by the Athénée Royal de Gembloux. Adult participants begin at 19:00 and can select between a 5 km or 10 km distance. The 10 km route involves completing the 5 km loop twice. This race is designed for a wide range of participants, not exclusively fast club runners, featuring an accessible urban course, aid stations, professional timing, and changing facilities. The school's involvement is integral to the event. Children under 12 can participate in a free kids' run at 18:30, and childcare is provided during the adult races. Students and school staff benefit from a reduced entry fee, with affordable options available for external runners. Following the races, a bar and refreshments are available, making the event a community gathering for the local school and residents, in addition to being a 5 km or 10 km race.

The Corrida du Sacré-Coeur is a Friday-evening road race held in Écaussinnes, Hainaut, Belgium. It starts at the École du Sacré-Coeur on Rue du Flou. The primary distances offered are 5 km and 10 km, with additional 800 m and 1.6 km races for younger participants. Runners begin from Place Cousin. The event is designed for children, casual joggers, club runners, and individuals seeking a brief local race following their workday. Now in its twentieth edition, the Corrida du Sacré-Coeur is listed in the Atlas des Joggings et Marathons de Belgique. It attracts hundreds of participants and concludes with refreshments, a post-work social gathering, and occasional live music.