Mars offers several distinct reasons to stay: a visit to Planète Mars – Observatoire Hubert Reeves, volcanic lava formations near Montréal, and opportunities for cycling and hiking. These activities also differ in how they can be planned. A visit to the observatory depends on its program and reservations, a hike on a monthly date, and a cycling route on local trail conditions.
Observatory: visits according to the program
Planète Mars – Observatoire Hubert Reeves is open to the public according to its program and, in particular, by reservation. Anyone wishing to include this visit in their trip should therefore take the program and reservation requirements into account, rather than assuming they can visit at any time. This makes the observatory a specific focus for planning, with visit times subject to the stated conditions. Before your trip, check which program suits your plans.
Montréal and Saint-Romain-le-Désert
Montréal is one of the two volcanic enclaves in the commune of Mars. Large masses of lava with a prismatic structure define this landscape feature. Their prismatic shape gives the visit a clear geological focus: you can consider Montréal as a destination in its own right, alongside a visit to the observatory or a sporting activity.
The area’s history is another distinct point of interest. The hamlet of Saint-Romain-le-Désert was once the main settlement and has a parish church. The hamlet’s former role and the church building offer a different perspective on Mars from its volcanic lava formations or outdoor activities. If you want to give different weight to the landscape and history, you can consider them as separate reasons for choosing this trip.
By mountain bike or on foot
For a mountain-bike ride, L’Observatoire - VTT FFC N°26 Bleu is the specifically described route: it is 13.7 kilometres long, of moderate difficulty, and circular. The route crosses a high plateau and starts in the village of Mars; both the start and finish are at the campsite in Mars. Its length, difficulty level, and circular layout give the route a distinctive profile. Check local trail conditions before setting off.
Planète Rouge offers a hike for everyone on the second Wednesday of each month. It can be a full-day or half-day outing; the format may vary from one hike to the next. It ends with a convivial get-together at the shop. If you want to include this hike in your plans, check the date again before your trip and bear in mind when planning your day that the duration and format can vary.
Which focus suits your stay?
The activities can be weighed up according to their different planning requirements: the observatory depends on its program and reservations, while the Planète Rouge hike depends on its monthly date and the format for that particular day. The mountain-bike circuit, by contrast, is defined by its length, moderate difficulty, and route across a high plateau; local conditions should be checked before setting off. This will help you decide whether a visit scheduled for a specific date, a hike, or a mountain-bike ride should shape your stay.
The landscape and history also offer distinct points of interest: Montréal is known for its prismatic lava formations, while Saint-Romain-le-Désert is associated with its former role as the main settlement and its parish church. This selection helps you assess Mars according to your personal interests, without combining the different experiences into a single itinerary. Plan your trip around the focus that matters most to you.
Discover more destinations: Dompnac, Jaunac, Saint-Genest-De-Beauzon, Lagorce, Saint-Sauveur-De-Cruzières, Sablieres, Fabras, Empurany.
Go to the regional travel overview: Ardèche.
