Doctor Hannah Lock


I am an Emergency Medicine Doctor and Expedition Doctor specialising in trekking and mountaineering at high altitude. I live and work on the edge of Snowdonia National Park, North Wales. 

My mountain medicine blog

Insightful and informative content designed to be accessible to mountain professionals, mountain medics and all mountain adventurers.

This blog has updates on everything from preparing for a high altitude expedition to managing tick bites.

Click here for my blog.

Online Course Coming Soon...

Since May 2022 I have been creating an online course called Humans At High Altitude. I’m aiming to make the course live by Winter 2022. 

More details can be found here.

Here is a screen shot of the homepage as a little teaser…

Humans At High Altitude

What my clients say

Here are some people that I've had the pleasure of working with.

“Hannah was a brilliant doctor who was always there to help with any problem we had no matter how big or small the issue was, very easy to communicate with and helped massively with helping us all summit.”
Hassan Mansur
Kilimanjaro, 2018
“Enthusiasm and applied knowledge in abundance and what a sense of humour, just tremendous.”
Norman Davies
Stok Kangri, 2019
“Worked like an absolute Trojan! Was always on hand to help and encourage you every step of the expedition. Put other people’s care before herself and always had a smile.”
Katherine Robinson
Kilimanjaro, 2018 ​

My gallery

Here are some of my favourite shots from my travels around the world.