How far is Grand Mound, WA from Spokane Valley, WA?
The driving distance from Grand Mound, WA to Spokane Valley, WA is about 346.1 miles (557 km), with a travel time of about 05h 35m by car.
- The straight-line flight distance is about 277.6 miles (446.7 km).
- For a round trip, plan for roughly 11h 10m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 6:00 AM to 8:00 AM PDT.
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 35m.
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 Kittitas County, Washington, United States
Route Weather Snapshot
Check the forecast at both ends before you head out.
Patchy Fog
Mostly Cloudy
Driving Route Map
The map below follows the saved road route between Grand Mound and Spokane Valley.
Turn-by-Turn Driving Directions
Step-by-step road directions between Grand Mound and Spokane Valley.
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1
Start on the route
89 m · 27 sec
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2
Turn left
30 m · 9 sec
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3
Turn right onto Old Highway 99 Southwest
1.3 km · 2 min · Old Highway 99 Southwest
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4
Enter the roundabout and take exit 2 toward Large Round About
25 m · 5 sec · Old Highway 99 Southwest
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5
Exit the rotary onto Old Highway 99 Southwest
633 ft · 17 sec · Old Highway 99 Southwest
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6
Turn right onto US 12 West
1801 ft · 49 sec · US 12 West
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7
Take the ramp left toward I 5 North
1010 ft · 25 sec
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8
Merge slight left
44.9 mi · 54 min
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9
Keep slight right
8.2 mi · 10 min
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10
Take the exit slight right toward WA 18 East: Auburn, Muckleshoot Reservation
2644 ft · 1 min
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11
Merge slight left onto State Route 18
27.3 mi · 35 min · State Route 18
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12
Continue on Snoqualmie Parkway
656 ft · 8 sec · Snoqualmie Parkway
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13
Take the exit slight right toward I 90 East: Spokane
3019 ft · 1 min
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14
Merge slight left
251.7 mi · 4 hr 32 min
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15
Merge slight right
11.3 mi · 14 min
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16
Take the exit slight right toward WA 27
2039 ft · 52 sec
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17
Turn left onto North Pines Road
45 m · 11 sec · North Pines Road
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18
Arrive at your destination
0 m · 1 sec · North Pines Road
Car Route Details
A richer read on the saved driving route between Grand Mound and Spokane Valley.
Long-distance drive
This route is long enough that fuel, rest stops, weather, and timing matter more than any single maneuver.
I 90 East
Merge slight left
252 mi · 04h 32m
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.
Patchy Fog leaving Grand Mound and Mostly Cloudy near Spokane Valley.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Grand Mound to Spokane Valley?
The road trip is about 346.1 miles (557 km) and usually takes 05h 35m 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?
Kittitas is a useful midpoint, sitting about 172.9 miles from Grand Mound and 173.2 miles from Spokane Valley.
How much longer is the road route than the straight-line distance?
The direct path is about 277.6 miles (446.7 km), while the road route adds roughly 68.5 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 PDT. If you want a more comfortable same-day return, try to leave by 5:50 AM PDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $63.89 one way or $127.79 round trip. Estimated CO2 is about 108.5 kg one way.
What should you check before leaving?
Before you leave, expect Patchy Fog around Grand Mound and Mostly Cloudy near Spokane Valley.
Stop Ideas Near Kittitas
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 Kittitas.
Columbia Station
Quincy, Washington
Leavenworth, Washington
Leavenworth
Flight Path Map
This map shows the direct air route between Grand Mound and Spokane Valley. Straight-line distance: 277.55 mi (446.68 km).
#1 Grand Mound
City in Thurston County, Washington, United States
| Population | 2,981 |
| Coordinates | 46.7878800, -123.0112500 |
| Altitude | 51 |
| Country | United States |
#2 Spokane Valley
The most populous city in Spokane County, Washington.
| Population | 102,893 |
| Coordinates | 47.6732300, -117.2393700 |
| Altitude | 615 |
| Country | United States |
End: North Pines Road (-117.239528, 47.673234)
Estimated Travel Time
Distance: 557 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 11h 31m |
| 40 mph (64.37 km/h) | 08h 39m |
| 50 mph (80.47 km/h) | 06h 55m |
| 60 mph (96.56 km/h) | 05h 46m |
| 70 mph (112.65 km/h) | 04h 56m |
| 80 mph (129 km/h) | 04h 19m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $5.23 | $63.89 | $127.79 |
| Mid-grade | $5.57 | $67.97 | $135.95 |
| Premium | $5.77 | $70.46 | $140.93 |
| Diesel | $5.47 | $66.75 | $133.50 |
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 Washington · Apr 30, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.