Easy Gentle biking on tarmac roads or smooth dirt roads with few changes in gradient. No off-road biking experience required. Suitable for families. Moderate 5-6 hours per day of non-technical biking (on or off road). Moderate level of fitness required. Off road experience preferred but not essential. Moderate/Strenuous 5-8 hours biking per day over rough mountainous terrain with some difficult sections. Good physical fitness and some off-road MTB experience advised. Strenuous Long days biking 6-9 hours per day on rough and sometimes technical tracks with some significant climbs. Off-road experience and a good level of fitness essential. Extreme Demanding riding for experienced mountain bikers on technical trails involving long days over difficult terrain with significant climbing and descending.