TalkyToaster Maps: Detailed GPS Mapping for Outdoor Garmin Users
In this episode of the GPS Training Podcast, Jon speaks with Martin Overton, the creator of TalkyToaster maps, a specialist mapping system used by thousands of Garmin GPS users around the world.
TalkyToaster maps have developed something of a cult following among hikers, ultra-runners, mountain bikers, and expedition users who want more detail and better off-road routing than standard GPS maps provide.
This article focuses on how the maps work, what makes them different, and why so many outdoor users rely on them.
What Are TalkyToaster Maps?
TalkyToaster maps are third-party maps designed for Garmin GPS devices, including handheld units and many Garmin watches.
They are built using open mapping data combined with custom styling and additional terrain information, producing maps that are specifically optimised for outdoor navigation.
The maps are used by:
- Walkers and hikers
- Mountaineers
- Mountain bikers
- Ultra-distance runners
- Search and rescue teams
- Expedition travellers
- Military personnel and scientists working in remote areas
One interesting fact is that TalkyToaster maps are largely discovered through word of mouth. Many users find them through online reviews, forums, or recommendations from other GPS users.
Built from Open Mapping Data
TalkyToaster maps are created using two major data sources:
- OpenStreetMap – for map features such as paths, roads, and infrastructure
- NASA terrain data – for contour information
OpenStreetMap provides raw geographic data contributed by volunteers around the world. This includes features such as:
- Footpaths and tracks
- Bridges and gates
- Water points
- Buildings
- Woodland boundaries
- Infrastructure and navigation features
The key difference with TalkyToaster maps is that the raw data is carefully compiled, styled, and optimised specifically for outdoor use.
Why TalkyToaster Maps Are Different
Many GPS devices include maps such as Garmin TopoActive Maps. While these are useful, TalkyToaster maps go significantly further in several areas.
1. Far More Outdoor Detail
TalkyToaster maps expose far more features from the underlying mapping data.
Examples include:
- Stiles and gates
- Benches and water points
- Individual trees and tree lines
- Fences, hedges and stone walls
- Rock outcrops and cave entrances
- Sinkholes and geological features
- Navigation markers and marine features
In popular walking areas such as the Lake District, this can mean hundreds of additional mapped features compared with default GPS maps.
2. High-Resolution Contours
Contour detail is one of the biggest differences.
Typical GPS base maps often use:
- 50-metre contour intervals
TalkyToaster maps use:
- 10-metre contour intervals
This makes terrain much easier to interpret when navigating hills or mountains.
For example, on mountains such as:
- Scafell Pike
- Ben Nevis
- Snowdon
the extra contour detail gives a much clearer understanding of steepness and terrain shape.
3. Designed for Off-Road Routing
One of the most powerful features is fully routable off-road navigation.
Many GPS maps only allow off-road routing inside national parks or selected areas.
TalkyToaster maps allow routing:
- On footpaths
- On bridleways
- On cycle tracks
- On off-road trails
…and this works virtually anywhere, not just inside protected landscapes.
4. Styled to Look Like a Paper Map
The maps are also styled to resemble traditional British mapping.
For example:
- Footpaths appear as red dotted lines
- Bridleways appear as red dashed lines
- Cycle routes appear as blue dashed lines
This familiar appearance makes the maps easier for walkers who are used to reading paper maps.
Constantly Updated Mapping
One of the most remarkable aspects of TalkyToaster maps is how frequently they are updated.
Typical update cycles:
- British Isles maps: updated every week
- Global maps: updated at least monthly
Updates happen because:
- New paths are added
- Existing routes are corrected
- Terrain data improves
- Mapping errors are fixed
Since the data comes from global contributors to OpenStreetMap, mapping often improves rapidly when changes occur on the ground.
For example:
- New rights of way
- Path diversions after landslips
- Infrastructure changes
- Trail improvements
In some cases, updates can appear within days of a change occurring.
Global Coverage
TalkyToaster maps now cover more than 500 map regions worldwide.
They are used in locations including:
- The United Kingdom
- Europe
- North America
- Scandinavia
- Japan
- New Zealand
- Antarctica
The Antarctica map is even used by scientists working in the region.
Because the mapping is based on global open data, the same mapping system can be compiled for almost any part of the world.
Additional Specialist Data
Over time, many extra layers have been added to the maps.
Examples include:
Alpine difficulty ratings
Paths can include Swiss Alpine Club trail ratings, showing difficulty levels from easy walking trails to routes requiring scrambling or ropes.
Mountain bike trail ratings
Mountain bike trails can include technical difficulty grades.
Marine navigation features
For paddlers and small boat users, maps can include:
- Navigation buoys
- Anchorage points
- Offshore wind farms
- Navigation lights
-Military ranges
- Harbour features
Although they do not include depth data, they can be extremely useful for coastal navigation.
Outdoor shelters
Additional outdoor features include:
- Bothies
- Weather shelters
- Remote mountain huts
Used by Ultra-Runners and Expedition Athletes
TalkyToaster maps are widely used by participants in some of the UK’s toughest endurance events.
These include races such as:
- Spine Race
- Dragon’s Back Race
The maps have even been used by race organisers to help design new courses.
Their popularity with ultra-runners comes from:
- Detailed terrain mapping
- Reliable off-road routing
- Frequent updates
Map Installation Options
TalkyToaster maps are available in several formats.
Users can install them as:
- Direct downloads
- MicroSD cards for Garmin devices
- Remote installation via Zoom
- Subscription downloads with regular updates
Many users choose microSD cards because they are simple to install and reduce the risk of damaging the GPS unit’s internal storage.
Compatible Devices
TalkyToaster maps are designed primarily for **Garmin devices.
This includes:
- Garmin handheld GPS units
- Many Garmin outdoor watches
- Garmin cycling devices
They can also be viewed on Android devices using compatible apps, but they are not supported on platforms such as Suunto, Coros, or Apple devices, which use closed mapping systems.
Supporting Mountain Rescue
An important part of the TalkyToaster project is giving back to the outdoor community.
Donations from map downloads are regularly given to mountain rescue organisations including:
- Mountain Rescue England and Wales
- Scottish Mountain Rescue
- Mountain Rescue Ireland
These organisations rely heavily on volunteers and donations to operate in remote mountain environments.
Learn More
If you would like to explore TalkyToaster maps yourself, simply search online for “TalkyToaster maps” to find the official websites and resources.
The project now includes:
- A main information website
- A dedicated map store
- A subscription service for updates
- A comprehensive support and FAQ site
Together they form one of the most detailed and actively maintained third-party GPS mapping systems available today.