Rhys Jenkins

Rhys is a seasoned ultramarathon fanatic having spent the last 15 years compiling an impressive repertoire of race completions. He has survived the extreme cold of Iceland, tamed the suffocating heat of Death Valley and crossed the USA from coast to coast. He has completed many challenges including Badwater 135 (“the toughest footrace in the world”) and the Canalrace CIC 420-mile Canal Slam.

He has raised over £100,000 for a variety of charities, often by completing incredible feats of endurance, such as taking the Fastest Known Time for the 870-mile Wales Coastal Path and the 1,100-ish mile John O Groats to Lands End Three Summits challenge. In recognition of his charitable work, Rhys was selected as an Olympic torch bearer for the London 2012 Olympics.

Cerys Jones

Cerys leads on strategic finance & governance, having previously worked in the finance industry and cofounded repair Café Wales, a registered charity dedicated to reducing landfill waste, lowering carbon emissions, and fostering community resilience across Wales.

She brings high level organisational expertise to Pegasus together with an environmental awareness focused on the sustainability culture that is encouraged across the organisation. Cerys is also the brains behind our sister company Stable Adventures, organisers of The Ona 100 Series, Wild Horse 200 and Calon Lan 300, and the director of CanalRace CIC.

Chris Hewett

Chris met Rhys in the middle of the night on an ultra and subsequently started volunteering at Pegasus & Stable Adventures races. He is an experienced ultrarunner and has built a portfolio of 50 ultramarathon races, most notably Marathon des Sables (“the toughest footrace on Earth”), For Rangers Ultra 230 and a courageous DNF of Jungle Ultra in Peru (“the toughest footrace on the planet”)!

Chris also works behind the scenes on races, media events, and film locations around the world as an expedition paramedic, from Top Gear to James Bond, and from Spine Race to Gobi Ultra 400. Chris is a full-time specialist hazardous area paramedic and leads the operation of Pegasus in his spare time.

Chris dreams of organising an ultra in Tredegar, where his mother and her family grew up.

Helen Jacks-Hewett

Helen is an experienced and successful Animal Chiropractor who has run her own practice specialising in the treatment, care, and rehabilitation of horses and small animals since 2003. She holds a BSc (Hons) in Equine Science from the University of the West of England and a Post Graduate Diploma in Animal Chiropractic from the University of Wales. She is on the Register of Animal Musculoskeletal Practitioners, and for many years she has served as part of the external expert clinical team for a horse rescue charity.

Beyond her clinical animal work, she expanded her professional reach in September 2026 by becoming a director for Pegasus Ultra Running. Helen is a trail runner and enjoys routes and races in South Wales and the Mendips. She leads a very active life, both on foot and horseback, and is a passionate advocate for exploring the outdoors.