When Do Grand Teton Roads Open? 2026 Dates & Spring Guide
8 min read · Updated March 2026
Overview
Unlike Yellowstone — where roads open in staggered waves from mid-April through late May — Grand Teton National Park follows a simpler calendar. Most roads open on or around May 1, with a prized non-motorized window in late March and April.
2026 Grand Teton Road Opening Dates
| Road | Opens To | Target Date |
|---|---|---|
| Teton Park Road | Bikes & Pedestrians | Late March / Early April |
| Teton Park Road | Motor Vehicles | May 1 |
| Moose-Wilson Road | All Traffic | May 1 |
| Signal Mountain Summit Road | All Traffic | Mid-May (TBD) |
| Grassy Lake Road | All Traffic | Late May / Early June |
*Dates approximate. Verify at nps.gov/grte.
Teton Park Road
The Teton Park Road is the park's scenic inner road — roughly 20 miles from the Moose entrance to Signal Mountain Lodge. It passes Jenny Lake, the Cathedral Group Turnout, and trailheads including Taggart Lake and Lupine Meadows.
The road typically opens to motor vehicles on May 1. Even after opening, temperatures can drop below freezing at night and ice patches linger on shaded sections.
Moose-Wilson Road
The Moose-Wilson Road connects Moose to Teton Village — 8 miles of prime wildlife viewing. This road also opens around May 1. No trailers, RVs, or vehicles over 23 feet.
Signal Mountain Summit Road
The 5-mile Signal Mountain Summit Road climbs to 360° panoramic views at 7,700 feet. Opens mid-May, depending on snowmelt.
Grassy Lake Road (Ashton–Flagg Ranch)
For visitors from Island Park or Ashton, the 52-mile Grassy Lake Road connects Ashton to Flagg Ranch. Opens late May to early June. High-clearance vehicles recommended.
Non-Motorized Access Window
Before the Teton Park Road opens to cars, the park opens it to cyclists and pedestrians only — typically late March through April 30. The open section runs from Taggart Lake Trailhead to Signal Mountain Lodge — about 14 miles of car-free pavement.
What to Expect in Spring
April
25–50°F
Snow on most trails. Teton Park Road open to bikes only. Wildlife emerging.
May
30–60°F
Roads open May 1. High-elevation trails snowy. Peak waterfall flow.
For packing advice, see our weather & packing guide. Also check our Yellowstone road openings guide.
Day Trip from Island Park
Via Ashton & Teton Pass
~2 hours, 95 miles. Available year-round.
Via West Yellowstone
~2.5 hours, 110 miles. Mid-May through November.
For a complete itinerary, read our Jackson Hole & Grand Teton day trip guide.
Frequently Asked Questions
When does the Teton Park Road open to cars?
Typically May 1. Check nps.gov/grte for the latest.
Can I bike the Teton Park Road before it opens to cars?
Yes — the road opens to cyclists and pedestrians in late March or early April and remains car-free until motor vehicle opening day.
When does Moose-Wilson Road open?
Usually May 1, same as Teton Park Road. No trailers or vehicles over 23 feet allowed.
Is Grand Teton worth visiting in early May?
Absolutely. Stunning spring snow, wildflowers beginning, and a fraction of summer crowds.
How far is Grand Teton from Island Park?
About 75 miles (1.5 hours) via Ashton and Driggs, or 2.5 hours via West Yellowstone.