Sergeant Bluff, IA to Mason City, IA is 207.7 miles and takes about 4h 6m via US 20 and I 35, with a fuel budget near $33 and enough daylight to finish in a day. This trip stays within Iowa, traversing the Midwest region. It's a straightforward, mostly highway drive that's ideal for a single-day trip, connecting two points efficiently without requiring an overnight stay. You'll spend most of your time on major roadways, making it a practical choice for getting from point A to point B.
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
103.9 miles from Sergeant Bluff, IA
A natural place for your longest stop of the day
, about 2h 4m into the drive
.
Main Roads
Road
Distance
Duration
US 20
144.3 mi
2h 49m
I 35
47.4 mi
50m
US 18
3.6 mi
4m
19th Street Southwest
2.5 mi
4m
South Lewis Boulevard
2.3 mi
3m
Mallard Avenue
1.5 mi
2m
South Monroe Avenue
1.3 mi
2m
Singing Hills Boulevard
1.2 mi
2m
Longest stretch:
US 20
— 144.3 mi, about 2h 49m
Traffic on I-35
Hour-of-day weekday pattern from 8 FHWA count stations on your route.
Peak
2 PM
~642 veh/hr typical
· worst 1,026
Quietest
2 AM
~72 veh/hr
Peak-to-quiet ratio
8.9×
busier at peak than in the quiet hours
12a6anoon6p11p
Averaged across 81 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 Sergeant Bluff, IA and Mason City, IA.
1
Start on 4th Street
388 ft·24 sec·4th Street
2
Turn sharp left onto South Lewis Boulevard
2.3 mi·3 min·South Lewis Boulevard
Use the left / straight lanes.
3
Turn right onto Singing Hills Boulevard
1.2 mi·2 min·Singing Hills Boulevard
4
Turn left onto South Lakeport Street
0.3 mi·54 sec·South Lakeport Street
Use the left / straight / right lanes.
5
Take the ramp
0.4 mi·27 sec
Toward US 20 East, US 75 North
6
Merge onto US 20; US 75
2.0 mi·2 min·US 20; US 75
7
Take the exit onto US 20
0.4 mi·54 sec·US 20
Toward Fort Dodge
8
Keep slight right at fork onto US 20
142 mi·2 hr 46 min·US 20
Toward Fort DodgeUse the right lane.
9
Take the exit
0.3 mi·56 sec
Toward I 35 North: Mason CityUse the slight right lane.
10
Merge onto I 35
47 mi·50 min·I 35
11
Take the exit
1.0 mi·1 min
Toward US 18 East, IA 27 South: Mason City, Charles City
12
Merge onto US 18; IA 27
3.6 mi·4 min·US 18; IA 27
13
Take the exit
0.4 mi·52 sec
Toward Airport
14
Turn left onto Mallard Avenue
1.5 mi·2 min·Mallard Avenue
15
Continue on South Eisenhower Avenue
0.5 mi·44 sec·South Eisenhower Avenue
16
Turn right onto 19th Street Southwest
2.5 mi·4 min·19th Street Southwest
17
Turn left onto South Monroe Avenue
1.3 mi·2 min·South Monroe Avenue
18
Turn right onto 1st Street Northwest
0.4 mi·47 sec·1st Street Northwest
19
Turn left onto North Federal Avenue
328 ft·16 sec·North Federal Avenue
20
Turn right onto 2nd Street Northeast
24 ft·1 sec·2nd Street Northeast
21
Arrive at destination
2nd Street Northeast
Trip Plan
Given this is a 4-hour drive, leaving in the morning allows ample time to reach Mason City by afternoon. With only one recommended stop and a fuel cost around $33, it's an economical and efficient trip. The longest stretch without a major change in road type is 144.3 miles on US 20, so plan your fuel and breaks accordingly before you embark on that segment. This is a drive well-suited for a single day, so you have the flexibility to depart when convenient.
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 103.9 miles from Sergeant Bluff, IA, or about 2h 4m into the drive.
The longest continuous stretch on this route runs about 144.3 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 46 miles or 57m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 103.9 miles or 2h 4m in
This is the best place for your longest stop, a real meal, and a full fuel check.
Final approach
Final hour starts around 3h 21m
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 Sergeant Bluff, 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 Sergeant Bluff, IA
This is one driving day of about 207.7 miles and 4h 6m.
Your first comfortable stop window is around 46 miles from Sergeant Bluff, 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 144.3 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 18
5 decision points cluster between mile 0.1 and 196.4 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
7
0.1 mi into trip|~0m in|South Lewis Boulevard
Turn sharp left onto South Lewis Boulevard
Sharp turn - reduce speed on approach. Lane positioning matters here
Use the left / straight lanes.
5
3.9 mi into trip|~7m in
Take the ramp toward US 20 East, US 75 North
Multiple destination signs - pick the right one
Toward US 20 East, US 75 North
7
6.7 mi into trip|~11m in|US 20
Keep slight right at fork onto US 20 toward Fort Dodge
Highway fork - watch signs carefully. Lane positioning matters here
Use the right lane.
Toward Fort Dodge
6
148.6 mi into trip|~2h 57m in
Take the exit toward I 35 North: Mason City
Exit ramp - move to the correct lane early. Lane positioning matters here
Use the slight right lane.
Toward I 35 North: Mason City
5
196.4 mi into trip|~3h 49m in
Take the exit toward US 18 East, IA 27 South: Mason City, Charles City
Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one
Toward US 18 East, IA 27 South: Mason City, Cha...
Fuel & Cost
Regular Gas
$34.65 one way
$69.29 round trip
$4.24/gal25.4 MPG avg73 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$4.62
$37.80
$75.61
premium
$5.25
$42.95
$85.91
diesel
$6.28
$51.32
$102.64
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$35
Meals
$25–$50
Total
$60–$85
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 72.7 kg one way.
Prices: EIA weekly data, 2026-10-19.
Driving Electric?
About $22 in charging
· 0 stops
· 67% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
62.3
0
$21.81
$9.97
Efficient EV
51.9
0
$18.17
$8.31
EV Truck/SUV
83.1
1
$29.08
$13.29
Gas CO2
73 kg
EV CO2
24 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 Oct 19, 2026
Origin
Sergeant Bluff, IA
Morning
in Sergeant Bluff on Thursday
Local time
7:10 AM
CDT
Current temp
66°F
Mostly Sunny
SE 5 to 10 mph0% chanceLive forecast
Destination
Mason City, IA
Morning
in Mason City on Thursday
Local time
7:10 AM
CDT
Current temp
66°F
Partly Sunny
S 2 to 6 mph0% chanceLive forecast
57°F
Lake City, IA
104 mi in
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
Very similar conditions
Both ends of the route are sitting at about the same temperature right now.
Road read
4h 6m 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 route is predominantly highway driving, with 94% of the mileage on major roads. You'll experience a long stretch of 144.3 miles on US 20 before transitioning. Expect consistent cruising with fewer stops for traffic lights once you're on the main highways. The majority of your travel will be on broad, open roads rather than winding country lanes.
94% highway — fuel and pacing are the main things to plan.
21 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 144.3 mi on US 20.
How Hard Is This Drive?
6/10
This is a straightforward highway drive that stays mostly on US 20 and I 35. You will hit about 18 points where you need to pay attention to lane position or signs. The trickiest moment comes around 0.1 miles in near South Lewis Boulevard.
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 207.7 miles you will encounter 18 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 0.1 miles (South Lewis Boulevard): Sharp turn - reduce speed on approach. Lane positioning matters here; at 3.9 miles: Multiple destination signs - pick the right one; at 6.7 miles (US 20): Highway fork - watch signs carefully. Lane positioning matters here.
Elevation Profile
Mostly flat terrain
1,455 ft1,093 ft
Total Climb
528 ft
Total Descent
489 ft
Highest Point
1,455 ft
~44.8 mi in
Elevation Range
362 ft
Towns Mentioned on Route Signs
Based on OSRM destination-sign hints, not a full list of every settlement the road passes.
On the drive from Sergeant Bluff, IA to Mason City, IA, road signs begin pointing toward Charles City along the way.
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.
Top landmarks
•Dr. G.C. Stockman House — house designed by Frank Lloyd Wright
•Park Inn Hotel — hotel in Mason City, United States of America
Doable as a same-day drive at 4h 6m. Total distance: 207.7 miles.
Family Friendly
Moderate complexity with 1 natural rest stops along the way.
Solo Traveler
4h 6m drive, comfortable solo distance.
First-Time Driver
Mostly highway driving (94%). Some complex stretches to watch for.
Frequently Asked Questions
The longest stretch is about 144.3 miles on US 20. The full list of main roads is in the Roads section above.
Yes — we found about 11 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 Mason City, 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 11 rest areas along the route for bathroom stops.
The main spots that need attention: at 0.1 miles (South Lewis Boulevard): Sharp turn - reduce speed on approach. Lane positioning matters here; at 3.9 miles: Multiple destination signs - pick the right one; at 6.7 miles (US 20): Highway fork - watch signs carefully. Lane positioning matters here.
Possible but tiring. At 4.1 hours each way, an in-and-out day trip would put you behind the wheel for 8.2 hours — manageable with a long break at Mason City, IA, but most travelers stay overnight.
