Origin
Spencer, IA
Night in Spencer on Saturday
Local time
9:49 PM
CDT
Current temp
72°F
Unavailable
Live forecast
Trip from Spencer, IA to Mason City, IA
Compiled and reviewed by the US Trip Planner planning team at COD Solutions Oy · Last reviewed Apr 19, 2026 · Editorial standards
Drive Time
2h 30m
Distance
102.9 mi
166 km
Drive Score
9/10
Great drive
Same Day?
Yes, doable
Fuel Cost
$16
one way
EV Charging
Unknown
Best Time to Leave
4 AM
2h 20m
★
6 AM
2h 31m
8 AM
2h 51m
10 AM
2h 38m
12 PM
2h 36m
3 PM
2h 39m
5 PM
2h 50m
8 PM
2h 24m
Estimated drive times based on typical traffic patterns. Actual times may vary with weather, construction, and real-time conditions.
Spencer, IA
Jonas Horsch
Mason City, IA
Wikimedia Commons
Trip Overview
Spencer, IA to Mason City, IA is 102.9 miles and takes about 2h 30m via US Highway 18, with a fuel budget near $16 and enough daylight to finish in a day. This drive stays within the Midwest region, specifically Iowa, offering a straightforward journey between two points. It's a good option if you're looking for a relatively short trip that won't consume your entire day. The route is primarily highway-focused, making it efficient for those prioritizing getting from point A to point B without extensive detours. You'll encounter just one recommended stop along the way, contributing to its ease of planning.
Trip Pace
Same-day drive is realistic
A same-day return is realistic if you keep stops short.
Break Rhythm
1 planned break
A short stop every 2 to 3 hours is enough for this drive.
Midpoint
51.4 miles from Spencer, IA
A natural place for your longest stop of the day , about 1h 16m into the drive .
Main Roads
| Road | Distance | Duration |
|---|---|---|
| US Highway 18 | 65.6 mi | 1h 31m |
| 360th Street | 20.8 mi | 30m |
| 370th Street | 5.9 mi | 8m |
| 4th Street Southwest | 2 mi | 3m |
| 525th Avenue | 1.7 mi | 2m |
| Main Street | 1.4 mi | 2m |
| 1st Street Northwest | 1.2 mi | 2m |
| 240th Avenue | 1.1 mi | 1m |
Longest stretch:
US Highway 18
— 65.6 mi, about 1h 31m
Turn-by-Turn Driving Directions
Step-by-step road directions between Spencer, IA and Mason City, IA.
1
Start on East 4th Street
1.0 mi
·
1 min
·
East 4th Street
2
Continue on 350th Street
0.7 mi
·
1 min
·
350th Street
3
Turn right onto M50
1.1 mi
·
1 min
·
240th Avenue
4
Turn left onto US 18
21 mi
·
30 min
·
360th Street
5
Continue on US 18; IA 4
1.0 mi
·
1 min
·
450th Avenue
6
Continue on US 18; IA 4
1.4 mi
·
2 min
·
Main Street
7
Continue on US 18
5.9 mi
·
8 min
·
370th Street
8
Keep slight right at fork onto US 18
1.7 mi
·
2 min
·
525th Avenue
9
Turn left onto US 18
66 mi
·
1 hr 31 min
·
US Highway 18
10
Continue on US 18 Business; IA 122
2.0 mi
·
3 min
·
4th Street Southwest
11
Turn left onto Winnebago Way
0.5 mi
·
1 min
·
Winnebago Way
12
Continue on 1st Street Northwest
1.2 mi
·
2 min
·
1st Street Northwest
13
Turn left onto North Federal Avenue
328 ft
·
16 sec
·
North Federal Avenue
14
Turn right onto 2nd Street Northeast
24 ft
·
1 sec
·
2nd Street Northeast
15
Arrive at destination
2nd Street Northeast
Trip Plan
Given the 2h 30m estimated duration, this is a perfect same-day trip. You can easily depart in the morning and arrive with plenty of time to spare. With only one stop recommended and a fuel cost estimated at $16, planning is straightforward. Consider leaving Spencer, IA in the late morning to avoid any early rush and arrive in Mason City, IA in the afternoon. Keep an eye on your fuel levels as the longest stretch is over 65 miles; topping off before departing Spencer is a wise move.
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.
Plan roughly 1 meaningful break for fuel, food, and rest.
The halfway point lands around 51.4 miles from Spencer, IA, or about 1h 16m into the drive.
The longest continuous stretch on this route runs about 65.6 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 23 miles or 34m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 51.4 miles or 1h 16m in
This is the best place for your longest stop, a real meal, and a full fuel check.
Final approach
Final hour starts around 2h 2m
Traffic, exits, and arrival timing usually matter more near Mason City, 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 102.9 miles and 2h 30m.
Your first comfortable stop window is around 23 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 Highway 18 for about 65.6 miles.
Where to Stop
Rest stops, refuel points, and overnight suggestions along this route.
Mid-route town
Meal stop
51 mi into the route
Best for: Lunch, fuel, and a longer reset
This sits close to the middle of the route, so it works well for the longest stop of the day.
Pacing Suggestions
Fuel and coffee
A short stop after about 23 miles helps settle the day before fatigue starts building.
Meal break
The midpoint is around 51.4 miles from Spencer, IA, which is a good place for a longer meal and fuel stop.
Before the longest stretch
Fuel checkTop up before US Highway 18 if your tank is already low. That segment runs about 65.6 miles.
These stop ideas are pacing suggestions — the exact town or exit can change with traffic, hotel plans, and fuel range.
Heads-up: tricky spots
5 of 65 decision points cluster between mile 1.7 and 102.9 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
4
1.7 mi into trip
|
~3m in
|
M50 / 240th Avenue
Turn right onto M50 / 240th Avenue
Navigation decision point
4
2.7 mi into trip
|
~5m in
|
US 18 / 360th Street
Turn left onto US 18 / 360th Street
Navigation decision point
4
31.8 mi into trip
|
~48m in
|
US 18 / 525th Avenue
Keep slight right at fork onto US 18 / 525th Avenue
Highway fork - watch signs carefully
4
101.2 mi into trip
|
~2h 26m in
|
Winnebago Way
Turn left onto Winnebago Way
Navigation decision point
5
102.9 mi into trip
|
~2h 30m in
|
2nd Street Northeast
Turn right onto 2nd Street Northeast
Navigation decision point
Fuel & Cost
Regular Gas
$16.09 one way
$32.17 round trip
$3.97/gal
25.4 MPG avg
36 kg CO2
| Fuel Type | $/gal | One Way | Round Trip |
|---|---|---|---|
| midgrade | $4.36 | $17.66 | $35.33 |
| premium | $4.89 | $19.80 | $39.60 |
| diesel | $5.61 | $22.72 | $45.44 |
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$16
Meals
$25–$50
Total
$41–$66
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 36 kg one way. Prices: EIA weekly data, 2026-04-13.
Driving Electric?
About $11 in charging · 0 stops · 67% less CO2
| Vehicle Type | kWh | Stops | DC Fast | Home Charge |
|---|---|---|---|---|
| Average EV | 30.9 | 0 | $10.80 | $4.94 |
| Efficient EV | 25.7 | 0 | $9.00 | $4.12 |
| EV Truck/SUV | 41.2 | 0 | $14.41 | $6.59 |
Gas CO2
36 kg
EV CO2
12 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.
Destination
Mason City, IA
Night in Mason City on Saturday
Local time
9:49 PM
CDT
Current temp
71°F
Unavailable
Live 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
1 degrees cooler at arrival
A meaningful temperature swing is a good cue to rethink layers, water, and how soon you want to arrive.
Road read
2h 30m on the road
Use the two city cards together: check the sky where you start, then compare it with the local time and temperature at arrival.
Weather data from the National Weather Service. Conditions may change; check closer to your travel date.
What kind of drive is this?
This drive is 64% highway, meaning you'll spend a significant portion of your time on faster roads. Expect a highway-focused profile for much of the journey. The longest uninterrupted stretch you'll encounter is 65.6 miles on US Highway 18. This suggests a generally consistent driving experience for a substantial part of the trip. While the primary roads include US Highway 18, 360th Street, and 370th Street, the highway share indicates these will likely facilitate a steady pace rather than a winding, scenic exploration.
64% highway — fuel and pacing are the main things to plan.
15 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 65.6 mi on US Highway 18.
How Hard Is This Drive?
2/10
This is a straightforward highway drive that stays mostly on US Highway 18 and 360th Street. Navigation is very simple - set it and forget it for most of the drive. The trickiest moment comes around 1.7 miles in near M50 / 240th Avenue.
Driving Effort
2/10
Very easy - short and simple to drive
Balances navigation complexity with total wheel time.
The drive from Spencer, IA to Mason City, IA is easy. At 2h 30m with 64% highway, most drivers will find it relaxed and low-stress.
Where does it get tricky?
The main spots that need attention: at 1.7 miles (M50 / 240th Avenue): Navigation decision point; at 2.7 miles (US 18 / 360th Street): Navigation decision point; at 31.8 miles (US 18 / 525th Avenue): Highway fork - watch signs carefully.
About the Cities
Arriving in Mason City, IA
Full guide →Mason City is a city in Iowa, renowned for its collection of architecture by Frank Lloyd Wright and other Prairie School architects, considered the most significant concentration of such architecture outside of Oak Park, Illinois.
City content from Wikivoyage (CC BY-SA 4.0) and Wikidata (CC0).
Who Is This Route For?
Weekend Trip
Doable as a same-day drive at 2h 30m. Total distance: 102.9 miles.
Family Friendly
Moderate complexity with 1 natural rest stops along the way.
Solo Traveler
2h 30m drive, comfortable solo distance.
First-Time Driver
Mostly highway driving (64%). Straightforward navigation.
Frequently Asked Questions
The longest stretch is about 65.6 miles on US Highway 18. The full list of main roads is in the Roads section above.
Yes, with realistic expectations. Build in a stop roughly every 2 hours, have snacks and activities ready, and check the Nearby Places tabs for kid-friendly stops along the way.
The main spots that need attention: at 1.7 miles (M50 / 240th Avenue): Navigation decision point; at 2.7 miles (US 18 / 360th Street): Navigation decision point; at 31.8 miles (US 18 / 525th Avenue): Highway fork - watch signs carefully.
Yes. A round trip is manageable in a single day if you plan a break at Mason City, IA before heading back.
How this page is built
Compiled by the US Trip Planner planning team at COD Solutions Oy from open government datasets — OSRM over OpenStreetMap for geometry, and EIA for fuel prices. See our methodology for refresh cadence and limitations.
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