Desafío Ultra El Cainejo 2026
Recommended sun protection
High mountain in May. Intense UV radiation at the summits even with cloud cover.
Topical sun protection products specific to trail running: SPF 50+ sport sunscreen resistant to water and sweat, SPF lip balm and after-sun for recovery. At altitude, UV radiation increases by 10-12% per 1,000 metres, making sun protection not an extra but mandatory gear.
Based on historical data from the last 10 years
☀️11 hours of sunshine expected. Reapply SPF 50+ every 2 hours.
⛰️At the race altitude, UV radiation is ~61% stronger than at sea level.
Recommended products
ISDIN
Race pickISDIN Fotoprotector Fusion Water SPF 50+
Ultralight water-phase facial sunscreen with SPF 50+. Fluid texture that absorbs instantly with no greasy residue, ideal for applying during a race. Water and sweat resistant.
Strengths
- +Ultralight texture, feels invisible on skin
- +Sweat and water resistant
- +Instant absorption, ideal for mid-race reapplication
- +SPF 50+ with UVA/UVB protection
Watch out for
- −Small format (50 ml), may run short on ultras
- −Higher price than conventional sunscreens
Piz Buin
Race pickPiz Buin Mountain SPF 50+
Mountain sunscreen with SPF 50+ formulated for extreme altitude conditions. Extra protection against intensified UV radiation and cold wind. Rich texture that protects skin from dehydration.
Strengths
- +Specifically formulated for altitude and cold
- +Protects against wind, snow and sun simultaneously
- +Good value for money
- +Available in compact 20 ml format for backpack
Watch out for
- −Thicker texture, takes longer to absorb
- −May leave white residue on darker skin
Sun Bum
Race pickSun Bum Sunscreen Lip Balm SPF 30
Lip balm with SPF 30 sun protection in stick format. Moisturises and protects lips from sunburn, a spot many runners forget. Coconut flavour, paraben-free.
Strengths
- +Stick format easy to apply mid-race
- +Fits any backpack pocket
- +Moisturising and protective at the same time
- +Paraben and PABA free
Watch out for
- −SPF 30 may fall short at extreme altitude
- −Melts if left in direct sun
Specific tips for Desafío Ultra El Cainejo
- •SPF 50+ essential: UV radiation is 25% stronger at 2,000m
- •SPF lip balm to prevent sunburned lips
- •Apply before the start and carry a small bottle to reapply
- •Cap or visor recommended for exposed sections
Similar races
GTPE Picos de Europa
Benia de Onís
5 distances (70K to 10K) through the western massif of Picos de Europa from Benia de Onís
Riaño Trail Run
Riaño, León
Multi-stage trail in the Riaño Mountains — 3xTrail 84K / 2xTrail 47K / Open 42K across Picos de Europa, Montaña Palentina and Mampodre
Travesera Picos de Europa
Potes
72K and 36K across the three massifs of Picos de Europa, one of the toughest ultras in Spain