Maartensdijkse Bos and Smithuyserbos Loop

Nestled in the heart of Utrecht province, this gentle 9 km (about 5.6 miles) loop weaves through the tranquil Maartensdijkse Bos and Smithuyserbos woodlands, offering a flat, easy walk with virtually no elevation gain—perfect for beginners, families, or anyone seeking a peaceful day outdoors. The trailhead is conveniently located near the village of Maartensdijk, just off Dorpsweg, making it accessible whether you’re arriving by car or public transport. If traveling by train, the nearest major station is Bilthoven; from there, local buses connect to Maartensdijk, with stops close to the forest entrance.

Getting Started and Navigation

The loop begins at the edge of Maartensdijk, where you’ll find parking options and clear signage marking the entrance to the woods. For navigation, HiiKER provides detailed maps and GPS tracks, ensuring you stay on course through the sometimes-intertwined woodland paths.

Woodland Scenery and Wildlife

The first section leads you into Maartensdijkse Bos, a mixed forest of oak, beech, and pine. In spring, the forest floor is carpeted with wildflowers, while autumn brings a vibrant display of foliage. Keep an eye out for roe deer, foxes, and a variety of woodland birds, including woodpeckers and nuthatches. The undergrowth is rich with ferns and mosses, and the air is often filled with birdsong.

Transition to Smithuyserbos

Around the 4 km (2.5 mile) mark, the trail transitions into Smithuyserbos, a slightly denser woodland with a more secluded feel. Here, the paths narrow and wind through stands of ancient trees, some of which are centuries old. This area is known for its tranquility and is a favorite among local nature enthusiasts. Occasional clearings offer spots to rest and enjoy a picnic, and you may spot squirrels darting among the branches.

Historical Significance

Both forests are part of the historic Utrechtse Heuvelrug region, an area shaped by glacial activity during the last Ice Age. The land here has been managed for centuries, with traces of old boundary ditches and estate lands visible along the route. Smithuyserbos, in particular, was once part of a larger estate, and remnants of old carriageways and stone markers can still be found if you look closely.

Practical Tips

The entire loop is well-marked and mostly on wide, firm paths, making it suitable for all ages and abilities. There are no steep sections, and the total elevation gain is negligible—less than a meter (about 3 feet) over the whole route. Sturdy walking shoes are recommended, especially after rain, as some sections can become muddy. There are benches at intervals for rest, and the proximity to Maartensdijk means amenities like cafés and shops are never far away.

For those relying on public transport, check local bus schedules to Maartensdijk from Bilthoven or Utrecht Centraal. Cyclists will find bike racks at the forest entrance. Always carry a charged phone and use HiiKER for real-time navigation and trail updates.