The tours differ mainly in distance, climbing and how much support you get. The shortest is 22 km; the longest is a three-day camp of 320 km with van support, a hotel and a mechanic. Gravel days run from an easy 34 km on wide riverside tracks to 88 km with 1,600 m of climbing. Road rides include a hard half-day climb and a 118 km coast day.
Before booking, check the start point, what is included (bike hire, helmet, lunch, transfers), the group size and the minimum fitness the operator expects. Compare climbing as well as distance: 62 km with 1,180 m is a harder day than the distance alone suggests.