Chickerell Fleet Lagoon Circular Dorset Area of Outstanding Natural Beauty and the Jurassic Coast Team have pulled together a series of lovely short walks for you to enjoy. All of them start at bus stops along the Jurassic Coaster bus route in West Dorset. Chesil Beach – 15 miles long and born from landslides that eroded after the last ice age, 20,000 years ago – protects the special habitat of the Fleet Lagoon. The crashing, open sea is safely distant, a faint accompaniment to the calls of birds that find refuge in the tranquil waters.. Start point: Meadow Close bus stop, Chickerell. Distance: 4 miles / 6.4km. Walking Time: 90 mins not including stops. Route Difficulty: Easy.