The 6 best e-bike enduro routes in Zona Zero Ainsa 2026

Are you looking for the best e-bike enduro routes in Zona Zero Ainsa for your next trip in 2026? You're in the right place. Ainsa, in the heart of the Aragonese Pyrenees, is one of the most complete mountain bike destinations in southern Europe, and at Cinca Riders, we have been riding these trails every week for years, always with an e-bike. In this guide, we have selected six routes with their official real data, including distance, elevation gain, difficulty, as well as our terrain assessment: from the blue entrance of Banastón to the legendary black loop around the Mediano reservoir. Whether you're planning a weekend trip or an entire week, this is the plan.

The 6 best enduro routes

This is the selection we recommend to our clients this year, ordered from least to most demanding. It covers all profiles: from the perfect blue entrance for the first day, to the legendary full-day loop around the Mediano reservoir.

1. ZZ-013 The Forest of Banastón — the perfect entrance (blue)

The Forest of Banastón is the most accessible route in the network, with flowing trails between pine and kermes oak forests near the village of Banastón. It passes through the medieval arches of the village of Usana and descends to Ainsa via the GR-19 with medium difficulty. It is the least rocky option and works best on rainy days.

Distance	Elevation gain	Difficulty	Time	Start
18 km	+532 m	Blue	2–3 h	Ainsa (Cinca river)

Predominantly features natural berms and constant flow. It's the ideal option for a first day of the trip, for a beginner, or for combining with another route on the same day thanks to the motor. Suitable for muddy conditions.

🔗  Official Info — ZZ-013 The Forest of Banastón

2. ZZ-007 Bajo Peñas — the classic technical (red)

The ZZ-007 Bajo Peñas is one of Zona Zero's most iconic routes, with 55% singletrack and rocky descents at the foot of the limestone cliffs that dominate southern Ainsa. It passes near the San Victorián Monastery and goes through villages like Pueyo de Araguás, Oncins, and Torrelisa. It's demanding with a traditional bike; with an e-bike, it becomes an enjoyable outing because you conserve energy and focus for the technical rock gardens.

Distance	Elevation gain	Difficulty	Time	Start
26 km	+808 m	Red	3:30–4 h	Ainsa

Varied descents: rocky forest, fine terrain, and marl with flow. Suitable all year round (even with mud). Ideal for an intermediate-advanced e-bike rider looking for their first serious contact with the limestone terrain of Sobrarbe.

🔗  Official Info — ZZ-007 Bajo Peñas

3. ZZ-005 Peñas, Cinglas y Coda Sartén — the legendary (red+)

The ZZ-005 links three legendary sections of Pyrenean enduro: Peñas, Cinglas, and the Coda Sartén descent, one of the most emblematic descents in the Aragonese Pyrenees. With 60% singletrack, it climbs to Partara to take the little-known Peñas Cinglas trail, crosses the Ena River (be careful with storms) and ends with the Coda Sartén trialera before entering Ainsa via the medieval castle.

Distance	Elevation gain	Difficulty	Time	Start
20.72 km	+771 m	Red+	3–3:30 h	Aínsa (Margudgued)

With an e-bike, you can link the three descents in optimal physical condition and even consider repeating Coda Sartén if you enjoyed it, which would be unthinkable with a traditional bike. Not recommended with mud. Ideal for an advanced e-bike rider with previous experience in rock gardens.

🔗  Official Info — ZZ-005 Peñas, Cinglas y Coda Sartén

4. ZPlus-101 Tour de Partara — originally designed for e-bikes

The ZPlus-101 Tour de Partara covers the Partara mountain range, an icon of Zona Zero, with two loops (Cotón clockwise, Cinglas counter-clockwise) and 81% singletrack. The descent combines Partara Express and Fobón, two descents that make the day worthwhile. Designed with elevation gains that only make sense with a motor.

Distance	Elevation gain	Difficulty	Time	Bike
19 km	+940 m	Red	2:30–3:30 h	E-bike (≈500 Wh)

There are demanding uphill sections, so if you don't have enough uphill experience, you can ask us about alternatives. It is also important to carefully manage gear changes to avoid damaging the derailleur, preventing changes under maximum chain tension. Not recommended in muddy conditions. Ideal for e-bikers who want to maximize descents while exploring the Alto Sobrarbe.

🔗  Official Route Sheet — ZPlus-101 Tour de Partara

5. ZPlus-102 Sarrastaño — the wild option for e-bikes

The ZPlus-102 Sarrastaño is the second approved e-bike route, with 31 km, +1,250 m elevation gain, and 62% singletrack. It climbs to the top of Partara, then heads to Sarrastaño descending via Selva Sur. In Coscojuela, it connects with the San Miguel route in a counter-clockwise direction and finally descends via Partara Express. Very high-quality, demanding trails.

Distance	Elevation Gain +	Difficulty	Time	Bike
31 km	+1,250 m	Red	3:30–4:30 h	E-bike (500 Wh)

⚠️ Terrain warning: Currently (date of publication) the Mediano reservoir is over 90% capacity, so the bridge to Morillo de Tou may be flooded, meaning you'll have to find an alternative route back via road from Coscojuela (3km extra). Suitable for muddy conditions. Ideal for experienced e-bikers in Zona Zero looking for less-traveled terrain.

🔗  Official Route Sheet — ZPlus-102 Sarrastaño

6. ZZ-003 Mediano Reservoir Loop — the legendary full-day ride (black)

The ZZ-003 is Zona Zero's legendary route: 58.9 km, +1,550 m elevation gain, 9-10 hours, and 40% trail, all within sight of the Tower of Mediano emerging from the water. It's physically demanding but technically accessible for experienced trail riders. There's a specific e-bike variant: the ZZ-003 VAR eBIKE, which we recommend for a more reasonable ride.

Distance	Elevation Gain +	Difficulty	Time	e-bike Variant
58.9 km	+1,550 m	Black	9–10 h	Yes: ZZ-003 VAR

We recommend having everything you need, as at some points the route can be +20km by road from Ainsa. Our recommendation is to carry a tool kit, puncture repair kit, plenty of water and food, and avoid very hot days. There are several towns with bars/cafeterias where you can grab a drink, coffee, food, etc. Suitable for muddy conditions. Ideal as a trip goal: an epic day, not to be combined with other routes.

🔗  Official Route Sheet — ZZ-003 Around the Mediano Reservoir

How to plan your enduro e-bike trip to Zona Zero in 2026

What is the best time of year?

The best windows are spring (April–June) and autumn (September–October). Temperatures are ideal, the limestone terrain is dry, and the forests are at their best. July and August can be tough due to heat on the exposed southern routes (especially ZZ-003); winter brings snow at higher altitudes but allows riding on lower routes.

Shuttle and lifts: when yes, when no

Shuttles and lifts are useful options in specific scenarios, but not mandatory. They make sense when you want to access routes far from the Ainsa valley or when you are with a group of very different skill levels and need to equalize the pace. For the central area of Zona Zero, where the 6 routes recommended in this guide are located, all starting and ending in Ainsa or its surroundings, an e-bike is more than enough: you enjoy the climb and the descent equally, without depending on schedules or reservations. This is precisely the philosophy with which we operate at Cinca Riders.

On-site logistics

Ainsa is the natural hub: accommodation, shops, restaurants, a great atmosphere, and direct access to most routes. At Cinca Riders, we offer e-bike rental in Ainsa for Zona Zero — Trek Rail 9 Gen 3 (625 Wh) and Mondraker Crafty RR (800 Wh), technical support, transfers, guided tours, and terrain advice based on the day and real conditions. If you're coming for a long weekend or a whole week, contact us beforehand so we can arrange the complete plan for you.

Why is the e-bike the ideal bike for Zona Zero?

The e-bike is the ideal bike for Zona Zero for one specific reason: the accumulated elevation gain of most routes (the ZPlus-102 is +1,250 m and the ZZ-003 is +1,550 m) means that with a non-motorized bike, you arrive exhausted at technical descents, precisely where you need the most concentration and reflexes. With a motor, the climb ceases to be a toll and becomes part of the enjoyment.

These are the real advantages of riding Zona Zero with an e-bike, according to our experience operating in the area:

•      You arrive fresh for technical descents, which is where the risk is concentrated and where reflexes make all the difference.

•      You can link more routes in a day, multiplying the descent/day ratio without exhausting yourself.

•      You don't depend on shuttle schedules: the climb is yours, and you do it when you want.

•      You can repeat sections you liked, which is almost impossible with a non-motorized bike.

•      You adjust the plan to the day: if your legs ask for more, you go for it; if not, you modulate the assistance.

•      You access the central area of the network without logistics: remote routes become close.

At Cinca Riders, we exclusively rent e-bikes because we believe it is the tool that best adapts to the Zona Zero network, not because it's a trend.

Frequently asked questions about e-bike enduro routes in Zona Zero

Why does Cinca Riders only rent e-bikes?

Because the accumulated elevation gain in Zona Zero —+808 m on the classic Bajo Peñas, +1,250 m on the ZPlus-102, +1,550 m on the ZZ-003— means that the e-bike allows you to enjoy the network in optimal conditions: it reduces fatigue on climbs, improves concentration on technical descents, and makes any weekend plan more efficient.

Do I need a shuttle if I go with an e-bike?

For the central routes around Ainsa, no. The 6 routes we recommend in this guide start and end in Ainsa (or very close by), and the range of current e-bikes with 500 Wh easily covers any of them. A shuttle only makes sense if you want to access more distant routes or if you are with a group of very different skill levels.

How many routes can I link in a day with an e-bike?

Reasonable combinations: ZZ-013 (18 km / +532 m) + ZZ-007 (26 km / +808 m) for a comfortable day; or ZPlus-101 (19 km / +940 m) in the morning and ZZ-013 in the afternoon to complete the day. The ZZ-003 (58.9 km / +1,550 m) is a full-day outing and is not combined with anything else: it is the goal route of the trip.

What e-bike and battery do I need?

The e-bikes we offer at Cinca Riders are the Trek Rail 9 Gen 3 (625 Wh) and the Mondraker Crafty RR (800 Wh). With either of these, you can do all the routes in this guide and still have battery left for an additional afternoon ride. This is exactly what the Zona Zero network demands on a typical day.

Are the Zona Zero routes marked on the ground?

Routes ZZ-005, ZZ-007, and ZZ-013 are marked with official posts and signs. Routes ZPlus-101, ZPlus-102, and ZZ-003 are followed by GPS (track downloadable from zonazeropirineos.com). In all cases, we recommend having the GPX loaded on your bike or phone.

Zona Zero on an e-bike is a different league

Zona Zero is not a bike park: it is an entire territory designed by riders, for riders, with routes that have been refined for over a decade. But the difference between riding it under your own power and riding it with an e-bike is enormous: with a motor, a network of +5,800 meters of accumulated elevation gain across these six routes becomes manageable without suffering, the days are twice as productive, and you arrive at technical descents in optimal condition. These six routes are the best entry point for an enduro trip to Ainsa in 2026, all designed or reinterpreted to make the most of them with an electric bicycle.

Are you planning your enduro trip to Ainsa in 2026?

Book your e-bike rental at Cinca Riders and we'll put together the plan for you: bike, routes, and real-world tips, just like we ride every week.