The drive from Sudden Valley, WA to Seattle, WA covers 86.1 miles and takes about 1h 53m behind the wheel.
This route is realistic as a one-day drive if you keep your stops efficient.
The route leans on I 5, Lake Whatcom Boulevard, Alger Cain Lake Road for much of the mileage,
and the overall profile is highway-focused drive.
The longest uninterrupted segment is about 74.8 miles on I 5.
At current regular gas prices, budget about $18.02 one way before food or hotel costs.
Trip Pace
Same-day drive is realistic
A same-day return is realistic if you keep stops short.
Midpoint
43.1 miles from Sudden Valley, WA
A natural place for your longest stop of the day
, about 1h into the drive
.
Who Is This Route For?
Weekend Trip
Doable as a same-day drive at 1h 53m. Total distance: 86.1 miles.
Family Friendly
Moderate complexity with 0 natural rest stops along the way.
This is a 1h 53m highway drive covering 86.1 miles, with most of the trip on I 5 and Lake Whatcom Boulevard. The longest continuous stretch is about 74.8 miles on I 5.
Most of the miles stay on highways, which makes pacing and fuel planning easier than turn-by-turn city driving.
There are about 17 navigation steps in the underlying route data, so the final approach matters more than the middle miles.
I 5 is the longest continuous segment at about 74.8 miles.
How Hard Is This Drive?
This is a straightforward highway drive that stays mostly on I 5 and Lake Whatcom Boulevard. There are only a few real navigation decisions along the way. The trickiest moment comes around 0.2 miles in near Sudden Valley Drive.
Driving Effort4/10
Easy - simple navigation with a manageable amount of wheel time
Balances navigation complexity with total wheel time.
This is a straightforward 1h 53m drive. You will face about 11 decision points, but nothing that requires special attention if you follow navigation.
Where does it get tricky?
The main spots that need attention: at 0.2 miles (Sudden Valley Drive): Navigation decision point; at 10.7 miles (I 5): Merge point - match speed before joining. Lane positioning matters here; at 85.5 miles: Exit ramp - move to the correct lane early. Lane positioning matters here.
Critical Maneuvers
5 of 11 key points
These are the spots where you need to pay the most attention. Preview them before you drive.
5
0.2 mi into trip|~0m in|Sudden Valley Drive
At end of road, turn right onto Sudden Valley Drive
Navigation decision point
5
10.7 mi into trip|~22m in|I 5
Merge onto I 5
Merge point - match speed before joining. Lane positioning matters here
Use the straight / slight right lanes.
7
85.5 mi into trip|~1h 51m in
Take the exit toward Union Street
Exit ramp - move to the correct lane early. Lane positioning matters here
Use the slight right lane.
Exit 165B
Toward Union Street
7
85.8 mi into trip|~1h 52m in|5th Avenue
Turn left onto 5th Avenue
Lane positioning matters here
Use the left lane.
5
86.1 mi into trip|~1h 53m in|Madison Street
Turn right onto Madison Street
Navigation decision point
Main Roads
Road
Distance
Duration
I 5
74.8 mi
1h 28m
Lake Whatcom Boulevard
3.5 mi
6m
Alger Cain Lake Road
2.8 mi
4m
Cain Lake Road
2.1 mi
3m
Sudden Valley Drive
1 mi
4m
Lake Samish Road
0.9 mi
2m
5th Avenue
0.3 mi
<1m
Lost Fork Lane
0.2 mi
<1m
Longest stretch:
I 5
— 74.8 mi, about 1h 28m
Turn-by-Turn Driving Directions
Step-by-step road directions between Sudden Valley, WA and Seattle, WA.
1
Start on Tawny Circle
280 ft·11 sec·Tawny Circle
2
Turn left onto Lost Fork Lane
0.2 mi·41 sec·Lost Fork Lane
3
At end of road, turn right onto Sudden Valley Drive
0.7 mi·2 min·Sudden Valley Drive
4
Continue on Sudden Valley Drive
0.3 mi·1 min·Sudden Valley Drive
5
Continue on Sudden Valley Drive
169 ft·8 sec·Sudden Valley Drive
6
Turn right onto Lake Whatcom Boulevard
3.5 mi·6 min·Lake Whatcom Boulevard
7
Turn right onto Cain Lake Road
2.1 mi·3 min·Cain Lake Road
8
Continue on Alger Cain Lake Road
2.8 mi·4 min·Alger Cain Lake Road
9
Continue on Lake Samish Road
0.9 mi·2 min·Lake Samish Road
10
Take the ramp
0.2 mi·30 sec
11
Merge onto I 5
75 mi·1 hr 28 min·I 5
Use the straight / slight right lanes.
12
Take the exit
0.2 mi·25 sec
Exit 165BToward Union StreetUse the slight right lane.
13
Continue on Union Street
0.2 mi·41 sec·Union Street
Use the straight / left / right lanes.
14
Turn left onto 5th Avenue
0.3 mi·55 sec·5th Avenue
Use the left lane.
15
Turn right onto Madison Street
113 ft·9 sec·Madison Street
16
Turn left
31 ft·2 sec
17
Arrive at destination
Trip Plan
Morning Departure
Leave by 9 AM and you'll arrive before lunch.
Evening Departure
Even a 4 PM departure gets you there before dark in summer.
You can normally do this drive in one day.
You may only need one short stretch break if traffic stays light.
The halfway point lands around 43.1 miles from Sudden Valley, WA, or about 1h into the drive.
The longest continuous stretch on this route runs about 74.8 miles.
This is a comfortable same-day trip.
Departure
Before you leave
Start with fuel, water, and navigation already sorted so the first hour feels easy.
First stop
Around 19 miles or 32m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 43.1 miles or 1h in
This is the best place for your longest stop, a real meal, and a full fuel check.
Final approach
Final hour starts around 1h 36m
Traffic, exits, and arrival timing usually matter more near Seattle, WA than in the middle of the route.
Before You Leave
+
Open the route before leaving Sudden Valley, WA so your first major turns are already loaded.
Day 1
Settle into the route from Sudden Valley, WA
This is one driving day of about 86.1 miles and 1h 53m.
Your first comfortable stop window is around 19 miles from Sudden Valley, WA.
This route can stay practical as a one-day drive if traffic stays reasonable.
The longest stretch is on I 5 for about 74.8 miles.
Where to Stop
Rest stops, refuel points, and overnight suggestions along this route.
Halfway Point
Midpoint
About 43.1 mi from Sudden Valley, WA
· 1h into the drive
Place data sourced from public business listings. Hours and availability may vary.
National Parks Near This Route
Worth a detour if your schedule allows.
Klondike Gold Rush - Seattle Unit National Historical Park
National Historical Park
Seattle flourished during and after the Klondike Gold Rush. Merchants supplied people from around the world passing through this port city on their way to a remarkable adventure in the Yukon Territory...
Park data from the National Park Service API. Alerts update every 2 hours.
Fuel & Cost
Regular Gas
$18.02 one way
$36.04 round trip
$5.32/gal25.4 MPG avg30 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$5.58
$18.90
$37.80
premium
$5.77
$19.55
$39.10
diesel
$5.61
$19.01
$38.02
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$18
Meals
$25–$50
Total
$43–$68
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 30.1 kg one way.
Prices: EIA weekly data, 2026-04-13.
Driving Electric?
About $9 in charging
· 0 stops
· 67% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
25.8
0
$9.04
$4.13
Efficient EV
21.5
0
$7.53
$3.44
EV Truck/SUV
34.4
0
$12.05
$5.51
Gas CO2
30 kg
EV CO2
10 kg (67% less)
This trip is well within single-charge range for most EVs. No charging stops needed if you start fully charged.
DC fast charging avg $0.35/kWh. Home charging avg $0.16/kWh. US grid CO2: 0.39 kg/kWh.
Travel Intel
Current conditions at both ends of the drive.
Forecast as of Apr 17, 2026
Origin
Sudden Valley, WA
Evening
in Sudden Valley on Friday
Local time
7:04 PM
PDT
Current temp
52°F
Unavailable
Live forecast
Destination
Seattle, WA
Evening
in Seattle on Friday
Local time
7:04 PM
PDT
Current temp
56°F
Mostly Sunny
NNW 5 mph0% chanceLive forecast
Seasonal Notes
Summer travel usually means heavier construction, hotter rest stops, and busier weekend traffic around major cities.
Winter travel shortens daylight, so a route that looks manageable on paper can feel much longer after dark.
Holiday weekends tend to make both departure and arrival windows slower than the raw route time suggests.
Time zone
Same local time
Origin and destination are on the same clock, so arrival timing is easier to judge at a glance.
Temperature spread
4 degrees warmer at arrival
A meaningful temperature swing is a good cue to rethink layers, water, and how soon you want to arrive.
Road read
1h 53m on the road
The weather snapshot is not static. If you are leaving later, give both cities one more quick forecast check before departure.
Weather data from the National Weather Service. Conditions may change; check closer to your travel date.
Frequently Asked Questions
The drive from Sudden Valley, WA to Seattle, WA covers 86.1 miles and takes about 1h 53m without stops. Add 15-30 minutes for a fuel or rest stop on longer drives.
The main roads are I 5, Lake Whatcom Boulevard, Alger Cain Lake Road. Most of the drive stays on highways, so watch for ramps and exits.
This is a comfortable same-day trip.
The midpoint is about 43.1 miles from Sudden Valley, WA. Look for rest areas, gas stations, or food options near the halfway mark.
At current regular gas prices, expect to spend about $18.02 one way. This estimate uses 25.4 MPG — your actual cost will vary with your vehicle's fuel efficiency and current gas prices.
Leave by 9 AM and you'll arrive before lunch. Even a 4 PM departure gets you there before dark in summer.
This is a straightforward 1h 53m drive. You will face about 11 decision points, but nothing that requires special attention if you follow navigation.
The main spots that need attention: at 0.2 miles (Sudden Valley Drive): Navigation decision point; at 10.7 miles (I 5): Merge point - match speed before joining. Lane positioning matters here; at 85.5 miles: Exit ramp - move to the correct lane early. Lane positioning matters here.
The route from Sudden Valley, WA to Seattle, WA does not surface many named destination signs beyond the main corridor.
Yes. Nearby national parks include Klondike Gold Rush - Seattle Unit National Historical Park.
How this page is built
Compiled by the Trip.ovh planning team at COD Solutions Oy from open government datasets — OSRM over OpenStreetMap for geometry, EIA for fuel prices, and NPS for national parks. See our methodology for refresh cadence and limitations.
