Alexa Sienna Regis

Riding SOLO
Age: 24
Weight: 67 kg
Height: 1.75 cm

I have been riding for as long as I can remember, pretty much since before I could walk. Horses have always been a constant in my life. I grew up eventing and competed up to Intermediate and 2*, and I’ve represented England at a national level. When I’m home, I also hunt and have done so for many seasons since I was very young, which has taught me to trust a horse completely across unpredictable terrain.

The type of riding I’ve done has been wonderfully varied: the precision and discipline of dressage, the adrenaline and split-second decision-making of cross-country, the technical focus of show jumping, and the instinctive, natural riding that comes with long days out hunting. Together, these have shaped me into a rider who can stay calm, adaptable, and balanced no matter what the ground or the moment requires.

I’ve also been on safari multiple times, where I learned to adapt quickly to different horses, environments, and the unique challenges of riding alongside wildlife. Experiences like that have made me a more adaptable, intuitive rider and comfortable on a wide range of horses and in unfamiliar conditions.
Beyond the competitive side, my connection to horses is deeply personal. I’ve always loved their peaceful, grounding nature. Being alone with a horse is one of the few times I feel completely calm, as if all other noises of the world fade into the background. There’s something incredibly meaningful about the bond that forms when you build trust with an animal that powerful and and with that much perceptive. When that partnership clicks, it feels like you and your horse move as one, and in those moments, it genuinely feels like you could conquer anything together.

What drew me to The Pass of Tears was the feeling that this isn’t just a race, it is a rare chance to experience one of the last truly wild places on earth in the most elemental way: on horseback, exposed to the land, the weather, and the unknown. Opportunities like that don’t come around often, and I knew immediately it was something I wanted to be part of.
I love being outdoors and surrounded by nature; hiking, stalking, swimming in cold waters and the Scottish Highlands are my favourite place in the world for that reason. I see Patagonia like the Highlands multiplied by ten: untouched, vast, raw, and humbling. Argentina has been on my bucket list for years, but the idea of experiencing it through terrain this wild, and with a horse as your partner, goes above and beyond anything I could have imagined.

I’m also extremely competitive by nature; I love testing my limits, both physically and mentally. The idea of lining up against other riders who are equally hungry for the challenge absolutely fires me up. I’m not just there to take in the scenery, I want to push myself, see how far I can go, and give everything I have.
What motivates m is the ecombination of physical challenge, mental resilience, and connection with the horses. I’ve ridden my whole life, and the chance to test myself in a landscape that demands respect, while relying on the instincts and partnership of a mountain-bred horse is incredibly inspiring.

What I’m most excited for is the moment where the modern world drops away. No noise, no lights, no easy routes, no guarantees; just you, your horse, the weather, and the mountains. That sense of immersion, vulnerability, and immense competition is exactly why I signed up.

I also want to take on this challenge in memory of my late cousin, Iona, who tragically lost her life in a riding accident in 2019, age just 15. Horses were a passion we shared, and I know this is exactly the kind of adventure we would have taken on together. Iona had a natural horsemanship and a quiet bravery around horses that I have always looked up to. Riding The Pass of Tears feels like a way to honour her spirit, her courage, and the bond we had. The race will be my way of honouring her love for riding, horses, and the future she never got to have. I know I’ll feel her with me out there, especially in the hardest moments, and riding for her will be one of my biggest motivations throughout the race.