After a long career in education, information technology and academic publishing, Jacquetta became interested in long-distance walking and trekking. After completing the West Highland Way, her first long walk, in 1998 she progressed to Mount Kilimanjaro, which she has since summited four times by different routes. She is a member of the Outdoor Writers and Photographers Guild and in 2016 won its Award for Excellence (jointly with Max Landsberg) for their jointly authored guidebook Trek to Everest.
In 2000 she devised the waterproof, open-flat Rucksack Reader format with built-in maps for walking guidebooks. The first two titles, The Speyside Way (jointly with Jim Strachan) and The West Highland Way were soon followed by a further 33 Rucksack Readers. Of these, she has either written or co-authored 16, as well as editing them all and creating revised editions of the earlier books.
Over the years, she has walked and re-walked most of Scotland's Great Trails and many of England's National Trails. In 2013 she moved from Dunblane to Edinburgh, while also completing the route research for about 190 miles (including cycle options) of John Muir Way. The guidebook was released when the route was launched by the First Minister (21 April 2014). She also rewalked the Great Glen Way including High Routes for its fifth edition (2014). In 2015 she walked new sections of the West Highland Way and completed the Fife Coastal Path including Elie Chainwalk.
In April 2007 she was among the 200+ volunteers who trekked to Everest Base Camp (5360 m/17,585 ft), undergoing medical tests daily en route, see the feature in the Scotsman (17.2.07, Magazine p.38) or listen to the Radio Scotland item on Out of Doors. Since March 2007 she has been posting erratically on her blog.
Titles by Jacquetta Megarry
- The West Highland Way
- Great Glen Way
- The Speyside Way
- Cateran Trail
- Explore Mount Kilimanjaro
- Explore the Inca Trail: 3rd ed
- The Rob Roy Way: from Drymen to Pitlochry
- The Wicklow Way: Dublin to Clonegal
- Explore the Great Wall
- The Kintyre Way
- The Arran Coastal Way
- Kilimanjaro: Summit of Africa
- Hadrian's Wall Path
- Cleveland Way
- John Muir Way
- Fife Coastal Path
- Trek to Everest
- Annandale Way