Chicago gives a runner something almost no other big city does: twenty-six miles of
continuous lakefront path, most of it separated from traffic, running the whole length
of the city. The Lakefront Trail is the spine, the Riverwalk cuts west through the Loop
below street level, and the big South Side parks — Jackson, Washington, Grant — hang off
it like rooms off a corridor.
And it is flat. Genuinely, unusually flat. Measured against terrain data across
the nine routes below, the gentlest carries one metre of climb per kilometre and the
steepest three — a range narrower than the margin of error on most cities' flattest
route. Nothing here is a hill. What makes a run hard in Chicago is distance, and the
wind off the lake.
19 named features9 examples belowLake Michigan shore, Illinois
Nine routes in Chicago, nine different requests
Nine, drawn on demand
Asked for“an easy 5K by the water”
Grant Park and the lakefront
Grant Park and the lakefront is a 5.4 km loop from the middle of Chicago out to the water and back, with 13 m of climb in the whole thing. Buckingham Fountain, the harbour, and Lake Michigan on your left the entire way out.
Distance5.4 km
Ascent13 m
Steepest0.9%
On path2%
Lake MichiganGrant ParkBuckingham Fountain
Why this one
There is barely any climb to place: 13 m across 5.4 km, and never steeper than 0.9%. Only 2% of it leaves tarmac, less than any of the other eight — it is the one to run when you do not want to pick your feet up.
The Lakefront Trail north is an 8.0 km loop out of Chicago on the separated path that runs the length of the city. The trail carries no road crossing at all for the stretch this uses; the return through the streets does.
Distance8.0 km
Ascent15 m
Steepest1.5%
On path4%
Lake MichiganLakefront TrailTraffic-free
Why this one
There is barely any climb to place: 15 m across 8.0 km, and never steeper than 1.5%. 2% of it doubles back on ground already covered, and it stays within 1.6 km of the start.
Jackson Park and the lagoons is an 8.5 km loop through the Olmsted park on the South Side of Chicago, and the most off-road of the nine at 19% off tarmac. That is what a trail run is here: crushed-limestone park paths and the Wooded Island, not singletrack.
Distance8.5 km
Ascent9 m
Steepest0.8%
On path19%
Park pathsJackson ParkWooded Island
Why this one
There is barely any climb to place: 9 m across 8.5 km, and never steeper than 0.8%. 19% of it is off tarmac, more than any of the other eight.
Asked for“something short, right through downtown”
The Loop and the Riverwalk
The Loop and the Riverwalk is a 6.4 km loop from Millennium Park through the middle of Chicago, down onto the river at street level minus one and back up into the grid. It carries 22 m of climb, which in this city makes it the hilliest of the nine.
Distance6.4 km
Ascent22 m
Steepest1.1%
On path3%
Millennium ParkChicago RiverRiverwalk
Why this one
There is barely any climb to place: 22 m across 6.4 km, and never steeper than 1.1%. It doubles back on itself more than the others do, though that is still only 14% of its length.
Union Station and the South Loop is a 9.4 km loop from the concourse in Chicago, south along the river and back through Printers Row. It passes within 36 m of a public toilet, which is what was asked for.
Distance9.4 km
Ascent15 m
Steepest1%
On path5%
Union StationChicago RiverRestrooms
Why this one
There is barely any climb to place: 15 m across 9.4 km, and never steeper than 1%. 3% of it doubles back on ground already covered, and it stays within 1.3 km of the start.
The Chicago River west is a 12.9 km loop out of Chicago along the river that was famously made to run backwards. Out past the Loop on the Riverwalk, through the industrial west branch, and back along the north bank.
Distance12.9 km
Ascent25 m
Steepest1%
On path3%
Chicago RiverRiverwalkWest Loop
Why this one
There is barely any climb to place: 25 m across 12.9 km, and never steeper than 1%. 12% of it doubles back on ground already covered, and it stays within 1.6 km of the start.
Lincoln Park and the lagoon is a 7.2 km loop through the north-side park in Chicago, past the zoo and the conservatory and out along the water. Quiet ground, level for all of it, and never far from a way back into the grid.
Distance7.2 km
Ascent13 m
Steepest1%
On path4%
Lincoln ParkNorth PondLincoln Park Zoo
Why this one
There is barely any climb to place: 13 m across 7.2 km, and never steeper than 1%. 3% of it doubles back on ground already covered, and it stays within 1.0 km of the start.
Palmisano Park and Bridgeport is an 11.2 km loop from the old limestone quarry in Chicago, which is as close to a hill as this city gets. It carries 29 m and tops out at 3% on the quarry mound. In a flat city the hard run is the long one, and this is the ask answered honestly rather than pretended.
Distance11.2 km
Ascent29 m
Steepest3%
On path6%
Palmisano ParkBridgeportQuarry mound
Why this one
There is barely any climb to place: 29 m across 11.2 km, and never steeper than 3%. No part of it is run twice — the loop never comes back on itself.
The Chicago half marathon loop is a 21.4 km run from Grant Park, and the only one of the nine that gets you race distance without repeating a mile. South along the lakefront, west into Bronzeville and back up through the South Loop, with 38 m of climb in the whole distance.
Distance21.4 km
Ascent38 m
Steepest1.5%
On path6%
Half marathonLake MichiganLakefront Trail
Why this one
There is barely any climb to place: 38 m across 21.4 km, and never steeper than 1.5%. It goes further out than any of the others, 3.2 km from the start at the far point.
Each of those nine started as one sentence. Tell RunFlex the distance, the surface and when you need to be back, and it draws one from your front door — not from the middle of Chicago, and not from a list of runs other people have already done. If it isn’t right, say what is wrong and it draws another.
You describe it, it draws itA sentence in, a route on real streets out. Say “make it flatter” and it redrafts from what you already have.
It shows its workingEvery route above opens on the measurements it was judged against — where the climb sits, how much of it you run twice, what it never gets further than.
Then it goes to your wristOne tap sends it to the watch, which navigates turn by turn on its own GPS.
What you get here that you don't get from a route list
Side by side
Other route sites
RunFlex
What you get
Routes other people ran, in a fixed order
A route drafted for the run you asked for, tonight
Where it starts
Wherever that person started
Your front door
Why this route
No reason given
The scoring is on screen while it drafts
If it is wrong
Scroll to the next one
Say what is wrong and it redrafts
On the run
Your phone, in your hand
Turn by turn on your watch, phone left at home
Who has run it
Thousands of people, and the mud and the closed gate are in the comments
Nobody. It is drawn fresh, so you are the one finding out
That last row is the real trade. A library of routes has been tested by other runners
and a drafted route has not. RunFlex bets that being able to say what you want tonight
is worth more than that.
Leave the phone at home
Send any route above to an Apple Watch and it navigates on its own GPS, turn by
turn, with a tap before each one. The run syncs back when you are home. None of
the other sites on this search can do that, because none of them are an app you
run with.
What you can run to from the Loop
All inside 10 km of Millennium Park
Water
Lake MichiganChicago RiverJackson Park Lagoons
Parks
Grant ParkMillennium ParkLincoln ParkJackson ParkWashington ParkPalmisano Park
Traffic-free
Lakefront TrailChicago RiverwalkThe 606
Beaches
North Avenue BeachOak Street Beach31st Street Beach
The other thing that shapes a run here is how much light there is. The sun sets at
4:20 PM in mid-December and 8:27 PM in
mid-June, so the same after-work hour is a summer evening or a
night run depending on the month.
Computed for Chicago at 41.8780°N 87.6300°W, on the 15th of each month in 2026.
Times are local — daylight saving time where it applies — and the clocks
go back on November 1, 2026, after which sunset on the Monday is
4:43 PM. First and last light are civil twilight.
The numbers behind the chart
Month
First light
Sunrise
Sunset
Last light
Daylight
January
6:44 AM
7:15 AM
4:44 PM
5:15 PM
9h 29m
February
6:17 AM
6:46 AM
5:23 PM
5:52 PM
10h 38m
March
6:34 AM
7:02 AM
6:57 PM
7:24 PM
11h 55m
April
5:41 AM
6:10 AM
7:31 PM
8:00 PM
13h 22m
May
4:58 AM
5:30 AM
8:04 PM
8:36 PM
14h 34m
June
4:40 AM
5:14 AM
8:27 PM
9:01 PM
15h 13m
July
4:55 AM
5:28 AM
8:23 PM
8:57 PM
14h 55m
August
5:28 AM
5:58 AM
7:50 PM
8:20 PM
13h 52m
September
6:02 AM
6:30 AM
6:59 PM
7:27 PM
12h 29m
October
6:34 AM
7:02 AM
6:08 PM
6:36 PM
11h 06m
November
6:10 AM
6:40 AM
4:29 PM
4:59 PM
9h 49m
December
6:39 AM
7:11 AM
4:20 PM
4:51 PM
9h 09m
Try it on your own run. Say the distance and the surface, and RunFlex drafts it from your front door — not from the town centre, and not from a list.
The Lakefront Trail is the obvious start: eighteen miles along Lake Michigan, flat, paved and with no road to cross for most of its length. Grant Park sits at the middle of it and Lincoln Park to the north. Away from the water, the 606 runs west on a former elevated railway. All nine routes above start inside the city, and RunFlex will redraw any of them from your own front door.
Where can I run 5K in Chicago?
The Lakefront Trail is the obvious 5K in Chicago: pick any point and run a mile and a half out and back, flat, paved, with the lake on one side the whole way. The 606 is the alternative — 2.7 miles end to end on an elevated former railway, so out and back is a little over 8K and any part of it is a 5K.
Is there a traffic-free running route in Chicago?
The Lakefront Trail. Eighteen miles along Lake Michigan on a sealed surface, separated from traffic for nearly all of it, so it works as an out-and-back at any distance you choose. The 606 is the shorter alternative, 2.7 miles with no crossings at all.
Where can I run in Chicago without a car?
Every route on this page starts inside the city, so none of them needs one. Roosevelt on the Red, Orange and Green lines puts you at the south end of Grant Park and onto the Lakefront Trail, which runs eighteen miles along Lake Michigan with no road to cross. Anywhere on the Loop elevated is within a few minutes’ jog of the same path.
Where can I run with other people in Chicago?
The Chicago Area Runners Association organises group training across the city and is the usual first stop, particularly for marathon season. November Project meets outdoors, early and free. Fleet Feet and independent shops run free weekly group runs, most of them ending up on the Lakefront Trail. Any of the routes above works as a solo run the rest of the week, and RunFlex will redraw them from your own front door.
What is the flattest run in Chicago?
The flattest run in Chicago of the nine on this page is Jackson Park and the lagoons, at 9 m of climb over 8.5 km and never steeper than 0.8%. Union Station and the South Loop is next, at 15 m over 9.4 km. Both figures are measured off the drawn line rather than estimated from the map.
How hilly is Chicago?
Chicago is rolling rather than hilly. Measured across the nine routes on this page, the flattest carries 1.1 metres of climb per kilometre and the hilliest 3.4, and the steepest single pitch on any of them is 3%. The climbing sits in the valley sides rather than in any one hill.
When does it get dark in Chicago?
In Chicago the sun sets at 4:20 PM in mid-December and 8:27 PM in mid-June. The clocks go back on November 1, 2026, and sunset on the Monday after is 4:43 PM, so from early November most weekday running here happens after dark. The month-by-month figures are in the table above.
Nine of an unlimited number. Yours is not drawn yet.
Say the distance and the surface. RunFlex drafts it from your door and sends the one you pick to your watch. Ask again tomorrow and you get a different one. Free early access while it is being built — no card, and no price to pay yet.
RunFlex is built by Rob Gotlieb, who runs. The nine routes above were
drafted by RunFlex from the Chicago street and path network, measured by the same
services the app uses, and read by a person before this page went up. Nobody has run
them end to end — that is the trade in the table above.
If something here is wrong, and on a page of nine drafted routes something
eventually will be, tell us and it is fixed on the next build rather than sitting in a
comment thread.