Under the hood

What's under every play.

40+ datasets from 10+ agencies — read, scored and ranked against your profile before a single play is written.

186
Colorado game management units
43 elk herd units, scored by year
135K mi
Miles of road mapped
23K miles of trail · 2.5K trailheads
40+
Public datasets read for every plan
10+ federal and state agencies
20+
Personalized inputs shape every plan

Glassline reads the same public data any hunter can pull. It never uses real-time animal locations, collar data, or crowdsourced sightings — and it never will.

Elk seasonal range

Summer, winter and severe winter range, concentration areas, migration corridors, production areas

CPW

Herd data

43 herd units: post-hunt population estimates, bull-to-cow and calf-to-cow ratios, trend and objective

CPW

Harvest records

Success rates, hunter counts, hunt codes, season dates, method of take

CPW

Terrain

Slope, aspect, terrain position, roughness from 10m elevation models

USGS 3DEP

Vegetation

Canopy, shrub, grass and bare ground at 30m; July greenness against a 10-year baseline

USGS · USFS

Snow and water

118 SNOTEL stations reporting daily, snowpack persistence, ~1M stream segments, 5.8K springs

NRCS · NSIDC · USGS NHD

Fire history

20 years of wildfire perimeters, post-fire browse zones, current-year fires and containment

NIFC

Access and trails

135K+ miles of road, 23K+ miles of trail, 2.5K trailheads, ~200 developed campgrounds

COTREX · USFS · BLM · OSM

Land ownership

8.5K public parcels — BLM, USFS, NPS, FWS, state wildlife areas and trust lands — with access status

COMaP · CPW

Daily Conditions

Daily snow readings, active fires, greenness anomalies

NRCS · NIFC
What the data doesn't cover

A public-lands map, not a parcel map

Ownership records cover public ground. Land with no record is treated as assumed-private and left out of the plan by default. You can manually create hunt areas on private land if you confirm you have permission. 

Unverified two-tracks stay unverified

Roads and trails from every agency are merged into one access layer with vehicle class and seasonal windows attached. A two-track that no agency vouches for is flagged as unverified — a good candidate for confirmation in the field; not relied on by Glassline's routing.

Points of interest

What a pin actually means.

Bedding cover. Feeding area. Bench. Saddle. Wallow. Glassing point. Every marker in Glassline is a description of the ground and why it suits the season you're hunting — terrain worth checking, not guaranteed animal locations. Glassline draws them from terrain, canopy, hydrography and season, then you modify them, add your own, and choose which to keep in your plan.

Points of interest on the Glassline map: feeding areas, bedding cover, benches, wallows.
01

Detected from terrain

Slope, aspect, canopy, water and season are scored across the hunt area at 10m resolution.

02

You curate the set

Keep the candidates that match what you know, drop the ones that don't, and drop your own pins. 

03

Plays are written around them

The pins you keep become the terrain your plays run in — with drive and hike routing and packout measured from the back of each one.

Feeding area

Open parks, meadow edges and burn regrowth, read from canopy cover and seasonal greenness.

Bedding cover

North-facing dark timber and steep shelves where canopy closure and aspect hold cover through the day.

Bench

Flat ground on a steep slope — the shelves that show up in 10m terrain data, not on a topo glance.

Saddle

Low points between drainages, where the terrain narrows into a natural corridor.

Wallow

Perennial seeps, springs and pond complexes in timber, from hydrography and slope.

Glassing point

Vantages with sight lines into the basin, scored for approach cover and morning light.

Water ambush

A setup on water, surfaced when the forecast turns hot and dry.

Camp

Legal, flat ground near water, inside the drive and hike limits you set.

Read our full stance on fair chase →
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Glassline maps the mountain, never the hunters.