Spencer, IA to Marion, IA is 246.5 miles and takes about 4h 58m via US 20 and Avenue of the Saints, with a fuel budget near $38 and enough daylight to finish in a day. This trip stays within the Midwest, traversing Iowa for its entire duration. Expect a mostly highway experience, making it a straightforward drive for a single day. It's a practical option if you need to cover ground efficiently within the state.
Trip Pace
Same-day drive is realistic
A same-day return is possible, but it will make for a full day on the road.
Break Rhythm
1 planned break
Plan on a short reset every 3 to 4 hours to stay fresh behind the wheel.
Midpoint
123.3 miles from Spencer, IA
A natural place for your longest stop of the day
, about 2h 35m into the drive
.
Main Roads
Road
Distance
Duration
US 20
153.3 mi
2h 56m
Avenue of the Saints
40.7 mi
43m
130th Avenue
29.1 mi
39m
215th Avenue
13.4 mi
18m
Collins Road Northeast
2.1 mi
2m
11th Avenue Southwest
1.5 mi
2m
County Highway 71
1.1 mi
1m
Marion Boulevard
0.6 mi
1m
Longest stretch:
US 20
— 153.3 mi, about 2h 56m
Traffic on I-380
Hour-of-day weekday pattern from 8 FHWA count stations on your route.
Peak
4 PM
~1,102 veh/hr typical
· worst 1,328
Quietest
2 AM
~74 veh/hr
Peak-to-quiet ratio
14.9×
busier at peak than in the quiet hours
12a6anoon6p11p
Averaged across 52 weeks of 2023 FHWA Travel Monitoring Analysis System data. Weekday hours only (Mon–Fri).
Turn-by-Turn Driving Directions
Step-by-step road directions between Spencer, IA and Marion, IA.
1
Start on East 4th Street
70 ft·8 sec·East 4th Street
2
Turn left onto US 18; US 71
0.5 mi·1 min·Grand Avenue
3
Turn right onto 4th Street Southwest
0.3 mi·38 sec·4th Street Southwest
4
Turn left onto 4th Avenue Southwest
0.5 mi·56 sec·4th Avenue Southwest
5
Turn right onto US 71
0.5 mi·58 sec·11th Street Southwest
6
Turn left onto US 71
1.5 mi·2 min·11th Avenue Southwest
7
Continue on US 71
13 mi·18 min·215th Avenue
8
Continue on US 71
1.3 mi·1 min·130th Avenue
9
Continue on US 71
1.1 mi·1 min·County Highway 71
10
Continue on US 71
28 mi·37 min·130th Avenue
11
Continue on IA 471
0.2 mi·20 sec·US 71
12
Take the exit
0.3 mi·50 sec
Toward US 20 East: Fort Dodge
13
Merge onto US 20; US 71
153 mi·2 hr 56 min·US 20; US 71
14
Keep slight right at fork onto I 380; IA 27
41 mi·43 min·Avenue of the Saints
Toward I 380 South, IA 27 South: Cedar Rapids
15
Take the exit
0.2 mi·31 sec
Toward IA 100
16
Keep slight left at fork
0.2 mi·19 sec
17
Keep slight right at fork
0.3 mi·27 sec
Toward IA 100
18
Keep slight left at fork
0.1 mi·16 sec
Toward I-380 south, IA 27 south: Iowa City
19
Turn left
0.6 mi·1 min
Toward I-380 north, IA 27 north, IA 100 east: Waterloo, MarionUse the straight lane.
20
Merge onto IA 100
0.3 mi·29 sec·Collins Road Northeast
21
Keep slight right at fork onto IA 100
1.8 mi·2 min·Collins Road Northeast
22
Turn left onto 1st Avenue East
0.1 mi·22 sec·1st Avenue East
23
Continue on Marion Boulevard
0.6 mi·1 min·Marion Boulevard
24
Continue on US 151 Business
0.3 mi·45 sec·7th Avenue
25
Turn left onto 6th Street
316 ft·17 sec·6th Street
26
Turn right onto 8th Avenue
0.3 mi·1 min·8th Avenue
27
Arrive at destination
8th Avenue
Trip Plan
Given the 4h 58m estimated duration, leaving in the morning allows plenty of time to reach Marion, IA, without feeling rushed. The drive is manageable in one day, so you can be flexible with your departure time. There's one suggested stop indicated, and with a fuel cost estimated at $38, it's helpful to factor that into your budget. Pay attention to the transition from US 20 to surface roads as you approach your destination, as this marks a shift in driving conditions.
Morning Departure
An early start around 7-8 AM gets you there with plenty of daylight left.
Evening Departure
A late afternoon start means arriving after dark. Morning is better.
You can normally do this drive in one day.
Plan roughly 1 meaningful break for fuel, food, and rest.
The halfway point lands around 123.3 miles from Spencer, IA, or about 2h 35m into the drive.
The longest continuous stretch on this route runs about 153.3 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 54 miles or 1h 15m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 123.3 miles or 2h 35m in
This is the best place for your longest stop, a real meal, and a full fuel check.
Final approach
Final hour starts around 4h 6m
Traffic, exits, and arrival timing usually matter more near Marion, IA than in the middle of the route.
Before You Leave
+
Open the route before leaving Spencer, IA so your first major turns are already loaded.
+
Leave with enough water and a charging cable within reach, not packed away.
+
Check your fuel range against the first long segment, especially if you are starting outside city service areas.
Day 1
Settle into the route from Spencer, IA
This is one driving day of about 246.5 miles and 4h 58m.
Your first comfortable stop window is around 54 miles from Spencer, IA.
This route can stay practical as a one-day drive if traffic stays reasonable.
Plan about 1 real break rather than only quick fuel stops.
The longest stretch is on US 20 for about 153.3 miles.
Where to Stop
Rest stops, refuel points, and overnight suggestions along this route.
Place data sourced from public business listings. Hours and availability may vary.
Heads-up: tricky spots
5 of 17
5 decision points cluster between mile 47.2 and 242.3 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
5
47.2 mi into trip|~1h 7m in
Take the exit toward US 20 East: Fort Dodge
Exit ramp - move to the correct lane early
Toward US 20 East: Fort Dodge
6
200.9 mi into trip|~4h 4m in|I 380; IA 27 / Avenue of the Saints
Keep slight right at fork onto I 380; IA 27 / Avenue of the Saints toward I 380 South, IA 27 South: Cedar Rapids
Highway fork - watch signs carefully. Multiple destination signs - pick the right one
Toward I 380 South, IA 27 South: Cedar Rapids
6
241.9 mi into trip|~4h 49m in
Keep slight right at fork toward IA 100
Highway fork - watch signs carefully
Toward IA 100
7
242.2 mi into trip|~4h 50m in
Keep slight left at fork toward I-380 south, IA 27 south: Iowa City
Highway fork - watch signs carefully. Multiple destination signs - pick the right one
Toward I-380 south, IA 27 south: Iowa City
7
242.3 mi into trip|~4h 50m in
Turn left toward I-380 north, IA 27 north, IA 100 east: Waterloo, Marion
Lane positioning matters here. Multiple destination signs - pick the right one
Use the straight lane.
Toward I-380 north, IA 27 north, IA 100 east: W...
Fuel & Cost
Regular Gas
$36.40 one way
$72.80 round trip
$3.75/gal25.4 MPG avg86 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$4.14
$40.19
$80.37
premium
$4.72
$45.77
$91.53
diesel
$4.80
$46.54
$93.09
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$36
Meals
$25–$50
Total
$61–$86
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 86.2 kg one way.
Prices: EIA weekly data, 2026-07-13.
Driving Electric?
About $26 in charging
· 0 stops
· 66% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
74
0
$25.88
$11.83
Efficient EV
61.6
0
$21.57
$9.86
EV Truck/SUV
98.6
1
$34.51
$15.78
Gas CO2
86 kg
EV CO2
29 kg (66% less)
Plan for 0 charging stops, roughly every 270 miles. Allow 25-40 minutes per stop at a DC fast charger.
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 Jul 18, 2026
Origin
Spencer, IA
Late night
in Spencer on Sunday
Local time
1:53 AM
CDT
Current temp
88°F
Chance Rain Showers then Mostly Sunny
NNE 5 to 10 mph11% chanceLive forecast
Heat Advisory
Heat Advisory issued July 18 at 1:35AM CDT until July 18 at 7:00PM CDT by NWS Quad Cities IA IL
Heat Advisory
Heat Advisory issued July 18 at 1:35AM CDT until July 18 at 7:00PM CDT by NWS Quad Cities IA IL
Destination
Marion, IA
Late night
in Marion on Sunday
Local time
1:53 AM
CDT
Current temp
89°F
Sunny
NW 10 mph6% chanceLive forecast
Heat Advisory
Heat Advisory issued July 18 at 1:35AM CDT until July 18 at 7:00PM CDT by NWS Quad Cities IA IL
Heat Advisory
Heat Advisory issued July 18 at 1:35AM CDT until July 18 at 7:00PM CDT by NWS Quad Cities IA IL
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
1 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
4h 58m on the road
An early start around 7-8 AM gets you there with plenty of daylight left.
Weather data from the National Weather Service. Conditions may change; check closer to your travel date.
More Details
What kind of drive is this?
This drive is predominantly on highways, with 63% of the route utilizing them. You'll encounter a long stretch of 153.3 miles on US 20. After this, the route transitions to surface roads like 130th Avenue, offering a change of pace from consistent high-speed travel. Be prepared for a more rural cruising feel as you move away from the main interstate segments.
63% highway — fuel and pacing are the main things to plan.
27 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 153.3 mi on US 20.
How Hard Is This Drive?
6/10
This is a straightforward highway drive that stays mostly on US 20 and Avenue of the Saints. You will hit about 17 points where you need to pay attention to lane position or signs. The trickiest moment comes around 47.2 miles in.
Driving Effort6/10
Moderate - straightforward overall, but long enough or busy enough to require pacing
Balances navigation complexity with total wheel time.
This drive requires moderate attention. Across 246.5 miles you will encounter 17 spots where lane choice or exit timing matters. Not difficult for experienced highway drivers, but worth previewing the tricky sections before you go.
Where does it get tricky?
The main spots that need attention: at 47.2 miles: Exit ramp - move to the correct lane early; at 200.9 miles (I 380; IA 27 / Avenue of the Saints): Highway fork - watch signs carefully. Multiple destination signs - pick the right one; at 241.9 miles: Highway fork - watch signs carefully.
Elevation Profile
Mostly flat terrain
1,411 ft803 ft
Total Climb
263 ft
Total Descent
735 ft
Highest Point
1,411 ft
~35.2 mi in
Elevation Range
608 ft
Detours Along the Way
Tagged by where each one fits in your drive — first break, midpoint, final stretch.
Spencer is in Western Iowa. A small town with a population of roughly 11,000. It is the county seat of Clay county. It is surrounded by a large area of agricultural land. The Little Sioux River runs through the town and divides it into North and South. Spencer is home to one of the largest county fairs in the world, the Clay County Fair. Being the largest community in the area attracts many people from smaller surrounding communities for both recreation and work.
Spencer was put on the map in the late 1980s, when the town library adopted an abandoned kitten and named him Dewey. Dewey became the unofficial town mascot over his 19-year lifespan. The head librarian's best-selling book, Dewey: The Small-Town Library Cat Who Touched the World offers an indelibly vivid portrait, not just of the beloved cat, but also of the town, and rural Iowa in general.
Top landmarks
•Clay County Courthouse — historic courthouse in Spencer, Iowa, USA
Doable as a same-day drive at 4h 58m. Total distance: 246.5 miles.
Family Friendly
Moderate complexity with 1 natural rest stops along the way.
Solo Traveler
4h 58m drive, comfortable solo distance.
Frequently Asked Questions
The longest stretch is about 153.3 miles on US 20. The full list of main roads is in the Roads section above.
Yes — we found about 9 rest areas or service plazas within a short detour of the route (from OpenStreetMap). See the Rest Stops tab under Nearby Places for locations and mile markers. Plan to stretch, use the bathroom, and top off fluids every 2–3 hours on longer drives.
It helps. This route has a higher-than-average number of complex decision points, which get harder in the dark. If the last hour of the trip is on surface roads or mountain grades, aim to arrive at Marion, IA before sunset when you can. Check the Trip Plan for departure windows that land you in daylight.
Only with planning. This is a long drive for kids — consider splitting it into two days rather than pushing through. Plan at least 1 meaningful breaks. There are 9 rest areas along the route for bathroom stops.
The main spots that need attention: at 47.2 miles: Exit ramp - move to the correct lane early; at 200.9 miles (I 380; IA 27 / Avenue of the Saints): Highway fork - watch signs carefully. Multiple destination signs - pick the right one; at 241.9 miles: Highway fork - watch signs carefully.
Possible but tiring. At 5.0 hours each way, an in-and-out day trip would put you behind the wheel for 9.9 hours — manageable with a long break at Marion, IA, but most travelers stay overnight.
