Heartwood Forest Circuit

Heartwood Forest near St Albans is England's largest new native forest, created by the Woodland Trust through planting half a million trees around surviving ancient woodland fragments. This 6.4 km circuit explores a landscape in fascinating transition — young plantation gives way to mature oak stands, and wildflower meadows occupy the spaces between wooded sections. The walking is gentle and paths are clearly marked, but the sheer scale of the planting and the optimism visible in the growing landscape make this feel genuinely special. Ancient woodland fragments provide proper forest character, while the newer sections show what patient conservation can achieve.

This dog friendly walk offers high off-lead potential and low livestock risk, making it one of the most relaxed walks in Hertfordshire for letting dogs run freely. The combination of ancient and new woodland provides continuously shifting scent environments — established forest floor with deep leaf litter and fungi gives way to younger trees where the understorey is still developing. Open meadow sections allow proper running space between the wooded stretches. The easy, flat terrain suits dogs of all ages, and the variety of habitats keeps walks here feeling fresh across the seasons.