# Colorado Trail (Denver–Durango)

Source: https://trailsim.com/routes/colorado-trail (TrailSim — route-matched travel eSIM with an offline dead-zone coverage report included). Countries: United States. Typical trip: about 35 days.

TrailSim estimate for the Colorado Trail: 31% of its 767 km has fast 4G/5G data, a further 20% has weak 4G signal only, and 38 dead zones total 324 km (the carriers' own coverage filings, snapshot 2026-08-04).

The signal is strongest between near Balltown and near Mount Elbert, where the model puts fast 4G/5G data at 96% of the stage. It runs thinnest between near Lujan Pass and near Sargents Mesa (0% fast data) — expect long stretches where maps and messages crawl or fail.

## Key figures

- Route analysed: 767 km, sampled every 500 m
- Fast 4G/5G data (usable data): 31% of the route
- Weak 4G signal only: 20%
- Dead zones (continuous 2 km or more with no signal on these networks): 38 totalling 324 km
- Networks compared: Networks: AT&T · Verizon
- Data source: FCC National Broadband Map (public domain), snapshot 2026-08-04
- Estimate, not a guarantee: real signal varies with terrain, weather and network load.

## Stages (preview)

| Stage | km | 4G/5G | weak 4G | No signal | Best network |
| --- | --- | --- | --- | --- | --- |
| near Durango → near Kennebec Pass | 0–25 | 20% | 28% | 52% | Verizon |
| near Kennebec Pass → near Orphan Butte | 25–50 | 12% | 24% | 64% | Verizon |
| near Orphan Butte → near Rico | 50–75 | 22% | 18% | 60% | Verizon |
| near Rico → Jura Knob | 75–100 | 4% | 12% | 84% | Verizon |

All 31 stages are in the PDF report included with the eSIM.

## Dead zones (preview)

| # | Near | Section | Length | Signal drops at | Returns at |
| --- | --- | --- | --- | --- | --- |
| 1 | near Durango | 2–4 km | 2 km | 37.33930, -107.92117 | 37.35452, -107.92742 |

…and 37 more dead zones, each with GPS coordinates, in the PDF and GPX report.

## eSIM plans

Fixed plans from $4.40 to $120.00 USD (16 options on the default validity shelf); pay-by-the-day plans from $0.94 per day (300 MB–1.5 GB a day at full speed, then slower, 1–90 days set on the payment page). Prices are live on https://trailsim.com/routes/colorado-trail. Days start on first use; 14-day self-service refund before installation; Stripe checkout in USD.

## Frequently asked questions

**Is there phone signal (cell service) on the Colorado Trail?**

On the networks TrailSim sells for the Colorado Trail, 31% of the route's 767 km has fast 4G/5G data and a further 20% has weak 4G signal only; 38 modelled dead zones totalling 324 km have no signal on its networks — the best-coverage plan on this page cuts this to 36 dead zones totalling 328 km. Cell service depends on which networks your eSIM roams on: the plans on TrailSim's Colorado Trail page are compared against exactly this route, and every dead zone is named and pinned with GPS coordinates in the coverage report included with each eSIM.

**How much data do I need for the Colorado Trail?**

Colorado Trail (Denver–Durango) typically takes about 35 days — around 18 GB at 500 MB a day. A single long-validity plan (60 or 90 days, under “More durations”) covers the whole trip, and its days start on first use. Worldwide, everyday smartphone use averages about 22 GB a month — roughly 730 MB a day — most of it video streaming (Ericsson Mobility Report, Nov 2025). On the trail the picture is lighter: with maps downloaded and video saved for wifi, messaging, photos, weather and bookings run 200–400 MB a day, so we size every recommendation at 500 MB a day for comfortable headroom. Size up if you stream, video-call or share your connection. If you would rather pay only for the days you are out, TrailSim's pay-by-the-day plans for the Colorado Trail give a full-speed daily allowance that slows down instead of cutting off, with the number of days set on the payment page.

**What is a pay-by-the-day eSIM plan?**

A daily allowance of 300 MB to 1.5 GB at full speed, then slower for the rest of that day — never cut off. It is priced per day: you set the number of days (1 to 90) on the payment page, pre-filled with the typical Colorado Trail trip length, and the days start on first use. It suits short trips and people who would rather never run out than carry a large fixed plan; the fixed plans on the same page are cheaper per gigabyte for a long trip.

**When do the plan days start counting?**

On first use — installing the TrailSim eSIM and connecting starts the clock, not the purchase date. You can safely buy weeks before your trip.

**Does my phone support eSIM?**

Most phones released since 2019 support eSIM, including iPhone XS and later, Google Pixel 3 and later, and most recent Samsung Galaxy models. Your phone must also be carrier-unlocked.

**Why not a regular travel eSIM from Airalo or Holafly?**

Any eSIM connects to the same physical networks. What TrailSim adds is the route check: it compares the carriers' own coverage filings along the Colorado Trail itself, picks the network combination that holds best there, and includes the coverage report with every dead zone mapped — so you know before you go where the phone will and won't work. A longer comparison is at trailsim.com/compare/airalo and /compare/holafly.

**What if parts of the route have no signal at all?**

On most wild routes some stretches have no signal from any network — no eSIM can change that. TrailSim's Colorado Trail coverage report marks every dead zone with GPS coordinates and length, so you can download offline maps for those sections and tell people at home when you'll be unreachable. Knowing where it drops is the point.

**What if I change my mind after buying?**

Uninstalled eSIMs qualify for a full self-service refund within 14 days of purchase — no questions asked. Once the eSIM is installed on a device it can no longer be returned.

## Related routes

- Continental Divide Trail (CDT): https://trailsim.com/routes/continental-divide-trail
- Great Divide Mountain Bike Route — US North (Eureka–Grants): https://trailsim.com/routes/great-divide-mountain-bike-route
- Alaska Highway (Alcan Highway / ALCAN): https://trailsim.com/routes/alaska-highway
- Appalachian Trail (AT): https://trailsim.com/routes/appalachian-trail

All 84 routes: https://trailsim.com/routes · Coverage index: https://trailsim.com/coverage-index · Glossary: https://trailsim.com/glossary

Route and place names © OpenStreetMap contributors (ODbL). © 2026 TrailSim.