MACKAY ATV/UTV FIELD GUIDE
Three Days in a Polaris RZR: Roaming the Lost River Valley’s Endless Trail Network
A three-day UTV rental from Lost River Adventures puts you in a brand-new Polaris RZR to explore hundreds of miles of trails across Idaho’s Lost River Valley—this guide explains what to expect and how to plan.
Three Days in a Polaris RZR: Roaming the Lost River Valley’s Endless Trail Network.
Lost River Adventures positions you in the heart of Idaho’s ATV/UTV country, handing off a brand-new Polaris RZR and the keys to a maze of trails that thread the Lost River Valley. Over the course of the rental you’re left to stitch together your own route across hundreds of miles of terrain—rock gardens, wide valley runs and quiet high-country approaches await on maps and in the machine’s wake.
Highlights
Outing Highlights
Brand‑new Polaris RZR
Rentals are in brand-new Polaris RZR UTVs provided by Lost River Adventures, giving you capable, modern off-road machinery for exploring the valley’s trail network.
Hundreds of Miles of Trails
The Lost River Valley offers an expansive trail system—hundreds of miles to explore—so each day of a multi-day rental can be shaped around long runs or a sequence of shorter loops.
In the Heart of Idaho’s UTV Country
Lost River Adventures operates smack in the middle of Idaho and the West’s ATV/UTV capital, a region geared to off-road exploration and trail riding from morning to dusk.
What the day feels like
What the Three‑Day Rental Feels Like
Each rental day begins with the handoff of a polished Polaris RZR and the sense of wide options: you can string together long corridor runs, punch out to scenic ridgelines, or explore tighter singletrack depending on your appetite. The machine turns the valley’s roughness into purposeful forward motion, leaving the logistics of routes and daily distance to your judgment while the operator’s fleet and local knowledge frame the experience.
Suitability
Who it's for
Who this rental suits—and who should reconsider.
Practical planner
Details to review before reserving
Bring your own food and water for each day and dress appropriately for the weather; the operator provides safety equipment.
Lost River Adventures supplies safety equipment for renters; confirm specifics during booking or in your confirmation materials.
Plan for sun, dust and temperature swings—carry water, layered clothing and any personal items you’ll need during long trail runs.
Review cancellation policies before reserving.
Frequently asked questions
Planning Your Outing
When do I pick up and return the UTV?
Pickup is at 8:00 AM; the vehicle must be returned by 5:00 PM on the last full rental day.
How old do I need to be to operate the UTV?
The operator must be at least 21 years of age.
Is insurance required?
Yes—drivers are required to purchase the operator’s insurance policy, which costs $30 per day.
Are waivers required?
Yes—waivers must be signed prior to operating the vehicles; links to these documents are provided in the confirmation email.
What should I bring for the ride?
Bring food and water for yourselves and dress appropriately for the weather; safety equipment will be provided by the operator.