Half Marathon races near Saint-Grégoire

La Rotte des gobions verts is a trail-running event in Romillé, Ille-et-Vilaine, Brittany, scheduled for early December. It features three distances: La Roulante, a 1.6 km inclusive run with a Handisport tag; L’Express, a 9.7 km race focused on the enjoyment of running; and La Légendaire, a 20.5 km option for those seeking a tougher challenge. The routes traverse varied trails through Breton nature, emphasizing off-road running over a flat city course. The range of distances accommodates diverse participants, from those seeking a short, friendly outing to experienced runners wanting a longer winter trail. The event's location also highlights nearby destinations like Rennes, Saint-Malo, and Carnac, reinforcing its Brittany setting.

Trail Bien Chaussée is a trail running event in La Chapelle-Chaussée, a village approximately 25 km from Rennes, situated between Gévezé and Bécherel. The sports hall serves as the event's center, hosting all starts and finishes. Participants can select from a 21 km course with 250 m of elevation gain, a 15 km course with 150 m of elevation gain, or a 7 km nature-path route with 50 m of elevation gain. The 7 km race is open to participants aged 16 and older, while the two longer races are for adults. The courses primarily traverse paths and wooded areas, meaning the terrain can become muddy and wet after periods of poor weather. The 15 km race features a water point around the 7 km mark, the 21 km race has one around 11 km, and all finishers receive a comprehensive refreshment stop. Participants are requested to bring their own cup or bottle. The event, organized by La Chapelle Bien Chaussée, continues the tradition of the Foulées de la Chapelle-Chaussée into its fortieth edition. A portion of the entry fees is donated to charity, and the local atmosphere is maintained with galettes-saucisses and a drinks stand available after the race.

The Semi-Marathon de Liffré is a 21.0975 km road race held in Liffré, a town in Ille-et-Vilaine, Brittany, near Rennes. Typically run in early April, the half marathon begins in the morning and is open to runners from the junior category upwards. The event also features races for children and juniors, catering to a range of age groups. It holds a national FFA label and qualifies participants for the French Championship, lending a competitive atmosphere to the local event. The course is designed for speed, consisting of two identical road loops with a downhill start and a finish on Rue Jules Ferry in central Liffré. Runners navigate the town center, rural roads, and the Rennes forest, with aid stations provided every 5 km. The race encourages fast times, evidenced by course records of 1:04:12 for men (Paul Njoroge Mugo) and 1:13:11 for women (Dorine Murkomen), with a cash bonus offered for any new record. While beginners are welcome, the flat, rolling course also attracts athletes aiming for personal bests or championship qualification.

Apiruntour's Liffré event offers races from 750 m up to 21 km as part of its spring program in Liffré. The primary distances include 5 km, 8 km, 13 km, 18 km, and 21 km. Shorter races are available over 720 m, 750 m, 1.5 km, and 3 km. The 18 km route presents the most climbing at 223 m. A 13 km option has 95 m of elevation gain, the 8 km route includes 62 m, and the shortest listed routes are nearly flat with 5 m of gain. Entry fees are 5 EUR for the 5 km, 8 EUR for the 8 km, 10 or 12 EUR for the 13 km depending on the start, and 18 EUR for both the 18 km and 21 km.