(BPT) - Kelly Twichel transformed a childhood challenge into a mission-driven business that's breaking down barriers and opening up the outdoors.

Sand and wheels don't mix. It's a simple physics problem that creates massive barriers for millions of people who use wheelchairs, scooters or other mobility devices. Yet, finding a practical, scalable solution has been anything but simple until San Diego entrepreneur Kelly Twichel started developing Access Trax .

Twichel's understanding of accessibility challenges began early. When she was only 12 years old, she remembers paramedics rushing up the stairs of her San Diego home after her mother, just 52, had suffered a massive stroke during the night and woke up with a disability that would change their family's life forever.

"Suddenly, she

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