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Printed Maps & App
Stay found. Stay informead. Our premium printed topographic maps and matching app for a once in a lifetime adventure

OnLine Data Books
Free online data books for your favorite trail, distances, elevation, climate, way points, terrain & fauna

Interactive Maps
GPS aware interactive maps, your location, topo, hybrid, satellite, trail track, way points, road, weather/snow overlays

Active Fires & Smoke
Know before you go! Get the lastest active fire & smoke information for your favorite trail

Snow Conditions
Get the lastest snow conditions for your favorite trail. Quantity, coverage, SNODAS, MODIS, historical and multi-year comparisons

Trip Planners
Create an extensive hike plan easily configurable to your hiking style. Distances, days, resupply, access points, etc

Gear Builder
Create your own fully customizable gear list with weight, pricing and divisable by section.

Trail Animals
Exhaustive resource for species ranges along your favorite trail. Includes amphibians, birds, mammals and reptiles.

Complete Gear Lists
Hundreds of complete gear lists by those that walked the walk.

Elevations Profiles
The big picture. Single elevation profile of your favorite trail.

Journal Tools
Search for a journal, create a journal, add/edit an entry, configure your journal, EMail updates, integrated interactve trail map, PLB locations and more

Wall Maps
Print out your favorite trail to 6 feet high. Elevation chart and resupply locations.

Postholer Forum
Source for trail and site information or just talk about your favorite trail

Where it all begins.

Resource for Hikers

Printed Maps & App

Interactive Trail Maps
(New) Map Tutorial

OnLine Data Books

Snow Conditions

Trail Fires 1950 - 2024

Trip Planners

Trail Animals

Elevation Profiles

On Trail Weather

Free & Simple Trail App

Gear Builder

PCT Permits, Updated

My Trail Journal

Sierra Snow Synopsis

Become a Patron


Visualizing unlimited Cloud Optimized GeoTiffs(COG) with single FlatGeobuf(FGB)
Adding Elevations to PCTA Data
GIS: Visualize Unlimited Geospatial Data Using Only Your Browser
GIS: Cloud Native Geo Guest Blog
GIS: (Geo)Parquet-Is-Not-A-Cloud-Native-Format
GIS: Faster Raster Data Acquisition
Next Generation Interactive Maps
GIS: Serverless Interactive Maps
Animation: Pacific Crest Trail Viewshed
Animation: John Muir Trail Viewshed
How Steep is the Trail?
femaFHZ: Flood, Fire, Quake, Risk & Peril
Fire Frenzy
CDT/GNP 2020-2021 Snow Animation
CDT/San Juan's 2020-2021 Snow Animation
Sierra 2020-2021 Snow Animation
2020 Fire Summary
Was that an Earthquake?
How close to the trail am I?
Trail Snow vs Snow Pack
2019 PCT Snow Notes
2019 CDT Snow Notes
2017 PCT Snow Notes

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