Basajaun Trail Race vs La Osera
Basajaun Trail Race (43km, 2550m D+) vs La Osera (45km, 2300m D+). Side-by-side comparison: distances, elevation, difficulty, mandatory gear and registration. Which one suits you best?
Advanced 
Advanced Physical profile
| Basajaun Trail Race | La Osera | |
|---|---|---|
| Date | 17 October 2026 | 16 May 2026 |
| Terrain | Mountain | Mountain |
| Difficulty | Advanced | Advanced |
| Max elevation gain | 2,550m D+ | 2,300m D+ |
Distances — Basajaun Trail Race
| Name | Km | D+ |
|---|---|---|
| BTR 43K | 43 | 2,550 |
| BTR 23K | 23 | 1,350 |
| BTR 13K | 13 | 700 |
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 |
Logistics & costs
| Basajaun Trail Race | La Osera | |
|---|---|---|
| Location | Galdeano, Navarre | Paterna del Madera, Albacete, Castile-La Mancha |
| Distance between venues | 461 km | |
| Registration opens | — | — |
| Registration closes | — | — |
| Mandatory Gear | 2 mandatory items | 0 mandatory items |
| Official website | Visit | Visit |
Pack 360 — Services
Registration
Basajaun Trail Race
No recommendations
La Osera
No recommendations
Accommodation
Basajaun Trail Race
No recommendations
La Osera
No recommendations
Gear
Basajaun Trail Race
-
Salomon Speedcross 6Recommended for bothSalomon
-
Salomon ADV Skin 12Salomon
-
Gore Wear R7 GTX ShakedryGore Wear
La Osera
- Salomon Speedcross 6Recommended for both
Salomon
Nutrition
Basajaun Trail Race
-
Maurten Gel 100Recommended for bothMaurten
-
226ERS Isotonic Drink226ERS
La Osera
- Maurten Gel 100Recommended for both
Maurten
-
Bocadillo de Guayaba Gourmet LatinoGourmet Latino
Transport
Basajaun Trail Race
No recommendations
La Osera
No recommendations
Car Rental
Basajaun Trail Race
-
Recommended for both
La Osera
-
- Recommended for both
Insurance
Basajaun Trail Race
No recommendations
La Osera
No recommendations
Body Care
Basajaun Trail Race
-
Buff CoolNet UV+Buff
-
Salomon Cross VisorSalomon
La Osera
-
After Bite Xtra GelAfter Bite
Sun Protection
Basajaun Trail Race
-
Recommended for both -
Recommended for both
La Osera
- Recommended for both
- Recommended for both
Summary
If you're looking for a longer distance, La Osera is the choice. If you prefer a shorter and more accessible race, consider Basajaun Trail Race. In terms of elevation gain, Basajaun Trail Race 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, Basajaun Trail Race or La Osera?
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.