We put the science in your summit.
Trailwater helps hikers like you carry exactly what you need – no more, no less – with a hydration calculator built on real sports science, not guesswork.
The Story
It started on a trail in the White Mountains. Four miles from the trailhead, 90°F heat, and my water bladder went dry. I had guessed wrong. Again.
That night, I started researching. How much water should I have carried? The answers were all over the place. “Drink when you’re thirsty.” “Carry one liter per hour.” “It depends.” Nobody had a straight answer.
The Mission
Trailwater exists to make every hike safer and more enjoyable through precision hydration planning. We believe that:
- No one should run out of water miles from nowhere.
- No one should carry unnecessary weight because they overestimated.
- Hydration isn't guesswork – it's math, science, and a little bit of trail wisdom.
Our Values
Science First
We don't guess. We cite sources.
Safety Above All
Every calculation includes a buffer.
Radical Transparency
We show you exactly how we calculate.
Community
We hike together, we learn together.
Meet the Team
Founder & Head Hiker
Data & Research Lead
Trail Expert & Community Manager