La Osera vs GR 322 Nafarroa Xtrem
La Osera (45km, 2300m D+) vs GR 322 Nafarroa Xtrem (35km, 1800m D+). Side-by-side comparison: distances, elevation, difficulty, mandatory gear and registration. Which one suits you best?
Advanced 
Advanced Physical profile
| La Osera | GR 322 Nafarroa Xtrem | |
|---|---|---|
| Date | 16 May 2026 | 25 April 2026 |
| Terrain | Mountain | Mountain |
| Difficulty | Advanced | Advanced |
| Max elevation gain | 2,300m D+ | 1,800m D+ |
Distances — La Osera
| Name | Km | D+ |
|---|---|---|
| Marathon 45K | 45 | 2,300 |
| Half Marathon 25K | 25 | 1,300 |
| Sprint Trail 12K | 12 | 600 |
| Hiking 12K | 12 | 600 |
Distances — GR 322 Nafarroa Xtrem
| Name | Km | D+ | Max Time |
|---|---|---|---|
| NX35 | 35 | 1,800 | 7h |
Logistics & costs
| La Osera | GR 322 Nafarroa Xtrem | |
|---|---|---|
| Location | Paterna del Madera, Albacete, Castile-La Mancha | Zubiri, Navarre |
| Distance between venues | 487 km | |
| Registration opens | — | — |
| Registration closes | — | — |
| Mandatory Gear | 0 mandatory items | 4 mandatory items |
| Official website | Visit | Visit |
Pack 360 — Services
Registration
La Osera
No recommendations
GR 322 Nafarroa Xtrem
No recommendations
Accommodation
La Osera
No recommendations
GR 322 Nafarroa Xtrem
No recommendations
Gear
La Osera
-
Salomon Speedcross 6Salomon
GR 322 Nafarroa Xtrem
No recommendations
Nutrition
La Osera
-
Maurten Gel 100Maurten
-
Bocadillo de Guayaba Gourmet LatinoRecommended for bothGourmet Latino
GR 322 Nafarroa Xtrem
- Bocadillo de Guayaba Gourmet LatinoRecommended for both
Gourmet Latino
Transport
La Osera
No recommendations
GR 322 Nafarroa Xtrem
No recommendations
Car Rental
La Osera
-
Recommended for both -
Recommended for both
GR 322 Nafarroa Xtrem
- Recommended for both
- Recommended for both
Insurance
La Osera
No recommendations
GR 322 Nafarroa Xtrem
No recommendations
Body Care
La Osera
-
After Bite Xtra GelAfter Bite
GR 322 Nafarroa Xtrem
No recommendations
Sun Protection
La Osera
GR 322 Nafarroa Xtrem
No recommendations
Summary
If you're looking for a longer distance, La Osera is the choice. If you prefer a shorter and more accessible race, consider GR 322 Nafarroa Xtrem. In terms of elevation gain, La Osera is the more demanding option. Both races offer a complete Pack 360 with everything you need for race day.
Frequently asked questions
Which is harder, La Osera or GR 322 Nafarroa Xtrem?
When does each race take place?
How many distances does each race offer?
What type of terrain does each race have?
Do I need the same mandatory gear for both?
Plan your race
Compare Spain's best trail running races side by side. Analyze distances, elevation, registration prices, mandatory gear and the complete Pack 360 to make the best decision.