How far is Forsyth, MT from Helena, MT?
The driving distance from Forsyth, MT to Helena, MT is about 333.7 miles (537 km), with a travel time of about 05h 20m by car.
- The straight-line flight distance is about 256.1 miles (412.2 km).
- For a round trip, plan for roughly 10h 40m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 6:00 AM to 8:00 AM MDT.
Reverse, save, or send this route
This drive is better planned with a longer stop or an overnight stay. Copy the route link, send it to another device, or print a clean version before you head out.
This drive is better planned with a longer stop or an overnight stay.
Flight Distance
Driving Distance
Gas Cost Calculator
Leave and Arrive Planner
Pick a departure time to see your estimated arrival and same-day return window.
Drive time stays fixed at 05h 20m.
An early departure helps you fit a real stop into the day without turning the return into a late-night drive.
You are leaving earlier than the recommended window, which gives you extra margin for breaks and traffic.
Halfway Point
A useful midpoint for breaks, coffee, or meeting in the middle.
City in and county seat of Sweet Grass County, Montana, United States
Route Weather Snapshot
Check the forecast at both ends before you head out.
Partly Sunny then Chance Rain Showers
Chance Light Rain then Showers And Thunderstorms
Driving Route Map
The map below follows the saved road route between Forsyth and Helena.
Turn-by-Turn Driving Directions
Step-by-step road directions between Forsyth and Helena.
-
1
Start on the route
25 m · 12 sec
-
2
Turn left onto North 10th Avenue
46 m · 9 sec · North 10th Avenue
-
3
Turn right onto Main Street
1.5 km · 2 min · Main Street
-
4
Turn sharp left
1414 ft · 26 sec
-
5
Take the ramp right
1647 ft · 40 sec
-
6
Merge slight left
93.2 mi · 1 hr 38 min
-
7
Merge slight left
2.8 mi · 3 min
-
8
Continue straight
112.8 mi · 1 hr 52 min
-
9
Continue straight
7 mi · 7 min
-
10
Continue straight
57.8 mi · 59 min
-
11
Take the exit slight right toward US 287: Helena, Ennis
1498 ft · 37 sec
-
12
Turn right onto Highway 287
63.5 mi · 1 hr 14 min · Highway 287
-
13
Turn left onto North Montana Avenue
146 m · 18 sec · North Montana Avenue
-
14
Turn right onto 11th Avenue
1.3 km · 2 min · 11th Avenue
-
15
Turn right onto Cruse Avenue
50 m · 6 sec · Cruse Avenue
-
16
Arrive at your destination
0 m · 1 sec · Cruse Avenue
Car Route Details
A richer read on the saved driving route between Forsyth and Helena.
Long-distance drive
This route is long enough that fuel, rest stops, weather, and timing matter more than any single maneuver.
Main Street
Continue straight
113 mi · 01h 52m
Route Summary
A quick read on whether this route feels easy, ambitious, or worth planning around.
A longer out-and-back drive
This is still possible in one day, but it becomes a long driving day. Leaving early and planning your stop window matters more here.
Partly Sunny then Chance Rain Showers leaving Forsyth and Chance Light Rain then Showers And Thunderstorms near Helena.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Forsyth to Helena?
The road trip is about 333.7 miles (537 km) and usually takes 05h 20m in normal driving conditions.
Is this a same-day trip or an overnight route?
This is still possible in one day, but it becomes a long driving day. Leaving early and planning your stop window matters more here.
What is the halfway point on this route?
Big Timber is a useful midpoint, sitting about 169.6 miles from Forsyth and 164.1 miles from Helena.
How much longer is the road route than the straight-line distance?
The direct path is about 256.1 miles (412.2 km), while the road route adds roughly 77.6 extra miles because roads do not follow the straight air line.
When is the best time to leave for this route?
A good departure window is usually 6:00 AM to 8:00 AM MDT. If you want a more comfortable same-day return, try to leave by 6:20 AM MDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $45.82 one way or $91.64 round trip. Estimated CO2 is about 104.6 kg one way.
What should you check before leaving?
Before you leave, expect Partly Sunny then Chance Rain Showers around Forsyth and Chance Light Rain then Showers And Thunderstorms near Helena.
Stop Ideas Near Big Timber
Useful break, food, and waypoint ideas within about 15 miles of the route midpoint.
Transit and Meeting Points
Useful pickup, handoff, or rendezvous points close to Big Timber.
Livingston, MT
Bozeman, MT
Billings, MT
Flight Path Map
This map shows the direct air route between Forsyth and Helena. Straight-line distance: 256.12 mi (412.18 km).
#1 Forsyth
Rosebud county seat and river town near Yellowstone River
| Population | 1,752 |
| Coordinates | 46.2663800, -106.6778100 |
| Altitude | 768 |
| Country | United States |
#2 Helena
State capital of Montana, United States and seat of Lewis and Clark County
| Population | 33,737 |
| Coordinates | 46.5927100, -112.0361100 |
| Altitude | 1237 |
| Country | United States |
End: Cruse Avenue (-112.036062, 46.592722)
Estimated Travel Time
Distance: 537 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 11h 07m |
| 40 mph (64.37 km/h) | 08h 20m |
| 50 mph (80.47 km/h) | 06h 40m |
| 60 mph (96.56 km/h) | 05h 33m |
| 70 mph (112.65 km/h) | 04h 46m |
| 80 mph (129 km/h) | 04h 09m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.89 | $45.82 | $91.64 |
| Mid-grade | $4.23 | $49.80 | $99.60 |
| Premium | $4.55 | $53.54 | $107.08 |
| Diesel | $5.41 | $63.70 | $127.40 |
Assumes 8.3 L/100 km (about 28.3 MPG). CO2 is an estimate and varies by vehicle, fuel blend, traffic, and terrain.
Prices in Montana · Apr 22, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.