Bristol runs on two levels. Down at the water there is the harbour, the Avon and the
Bristol and Bath Railway Path, which leaves the city on a disused railway and does not
meet a road for miles. Up above it there is the Avon Gorge, with Clifton and Durdham
Downs on one side and Ashton Court's deer park on the other, and a drop of ninety metres
between the two.
Which means the flat runs and the hard ones start a mile apart. Measured against
terrain data across the nine routes below, the gentlest carries under nine metres of
climb per kilometre and the hardest twenty-two — and the hard one begins on
Clifton Down, a few minutes' jog from the level grass of the Downs. Very few cities let
you choose that late.
20 named features9 examples belowAvon Gorge, Bristol
Nine routes in Bristol, nine different requests
Nine, drawn on demand
After dark
Asked for“an easy 5K by the water”
The Floating Harbour circuit
The Floating Harbour circuit is a 5.2 km loop round the water in the middle of Bristol, past the SS Great Britain and back along Welsh Back. Level for almost all of it, on hard surfaces the whole way, and never more than a few minutes from a bridge if you want to cut it short.
Distance5.2 km
Ascent51 m
Steepest2.3%
On path10%
Confirmed lit50%
Floating HarbourSS Great BritainQueen Square
Why this one
The climbing is spread evenly — no third of the route carries more than 39% of it. It is the tightest loop of the nine, never further than 0.8 km from the start, so you can cut it short wherever you are.
The Bristol and Bath Railway Path to Fishponds is a 10.3 km loop out of Bristol along a sealed former railway. The path itself is bridged or cut the whole way and carries no road crossing at all; the return through Easton does.
Distance10.3 km
Ascent90 m
Steepest4.1%
On path17%
Confirmed lit22%
Traffic-freeRailway PathFishponds
Why this one
The climbing is spread evenly — no third of the route carries more than 41% of it. No part of it is run twice — the loop never comes back on itself.
Ashton Court and Leigh Woods is an 8.1 km loop across the gorge from Bristol, with 39% of it off tarmac and 139 m of climb. Deer park, estate track and the woods above the Avon, and a lot of it is unlit — a daylight run in winter.
Distance8.1 km
Ascent139 m
Steepest10.8%
On path39%
Confirmed lit33%
TrailAshton CourtLeigh WoodsDaylight only
Why this one
53% of the climbing is in the last third. It finishes uphill, which is worth knowing before you set off. No part of it is run twice — the loop never comes back on itself.
Asked for“something short, right through the middle of town”
The old city and Brandon Hill
The old city and Brandon Hill is a 6.7 km loop from Bristol Cathedral through the middle of Bristol, and the flattest of the nine at 58 m of climb. College Green, King Street, the quays, and Cabot Tower if you want the one hill on it.
Distance6.7 km
Ascent58 m
Steepest5.7%
On path2%
Confirmed lit62%
Bristol CathedralBrandon HillKing Street
Why this one
The climbing is front-loaded: 52% of it inside the first third, so the run flattens out as it goes. 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.
Temple Meads and the New Cut is a 9.6 km loop from the station in Bristol, out along the New Cut and back by the harbour. It passes within 4 m of a public toilet, which is what was asked for.
Distance9.6 km
Ascent98 m
Steepest6.6%
On path2%
Confirmed lit56%
Temple MeadsNew CutToilets
Why this one
The climbing is spread evenly — no third of the route carries more than 40% of it. 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 River Avon Trail to Conham is a 12.8 km loop out of Bristol along the river, upstream through Netham and St Anne's Wood and back on the far bank. The trail stays with the water almost the whole way out.
Distance12.8 km
Ascent143 m
Steepest9.4%
On path6%
Confirmed lit42%
River AvonConham River ParkNetham
Why this one
59% of the climbing sits in the middle third — you start flat and you finish flat. 1% of it doubles back on ground already covered, and it stays within 1.6 km of the start.
Durdham Down and Redland is a 7.2 km loop from the open grass above Bristol, out to the gorge edge and back through Redland. Wide, quiet ground with sight lines in every direction, which is most of what makes a run feel safe at dusk.
Distance7.2 km
Ascent72 m
Steepest6.8%
On path7%
Confirmed lit50%
Durdham DownRedlandClifton
Why this one
60% of the climbing sits in the middle third — you start flat and you finish flat. 2% of it doubles back on ground already covered, and it stays within 1.1 km of the start.
Clifton Down and the gorge is a 12.4 km loop from the top of the Avon Gorge in Bristol, and the hilliest of the nine at 269 m of climb. It is also the most off-road of the nine at 46% off tarmac, because the way down into the gorge and back out of it is not a pavement.
Distance12.4 km
Ascent269 m
Steepest11%
On path46%
Confirmed lit18%
Clifton Suspension BridgeTrailAvon GorgeHilly
Why this one
49% of the climbing sits in the middle third — you start flat and you finish flat. 46% of it is off tarmac, more than any of the other eight.
Asked for“half marathon without repeating a kilometre”
Bristol half marathon loop
The Bristol half marathon loop is a 21.3 km run from the Harbourside, and the only one of the nine that gets you race distance without repeating a kilometre. Harbour, New Cut, the river out to Conham and back under the gorge, with 275 m of climb.
Distance21.3 km
Ascent275 m
Steepest10.5%
On path10%
Confirmed lit52%
Half marathonRiver AvonAvon Gorge
Why this one
53% of the climbing sits in the middle third — you start flat and you finish flat. It goes further out than any of the others, 2.6 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 Bristol, 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.
Running here after dark
Bristol is dark by 16:41 in December, so from late October most weekday runs here
happen at night. Every other route site tells you a run “feels safe”.
RunFlex reads the lighting recorded on the streets
themselves — the ways surveyed as lit, and the ways surveyed as unlit —
and matches them to the roads you would actually be running. Where nothing has been
recorded it says so, rather than counting silence as lit.
Coverage in Bristol holds across the city and stops at the gorge. The old city loop runs 62% on ways recorded as lit and 1% recorded unlit, and the harbour circuit 50% with nothing recorded unlit at all; the Clifton loop down into the gorge is 22% recorded unlit. Where the lighting cannot be confirmed, the app says so instead of guessing.
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 middle of Bristol
All inside 6 km of the Harbourside
Water
Floating HarbourRiver AvonRiver FromeAvon Gorge
Woods & down
Leigh WoodsAshton Court EstateClifton DownDurdham DownStoke Park
Parks
Brandon HillQueen SquareCastle ParkVictoria ParkSt Andrew's Park
Traffic-free
Bristol and Bath Railway PathRiver Avon TrailHarbourside Walk
Landmarks
Clifton Suspension BridgeBristol CathedralSS Great Britain
Daylight in Bristol, month by month
Sunrise to sunset
The other thing that shapes a run here is how much light there is. The sun sets at
16:01 in mid-December and 21:29 in
mid-June, so the same after-work hour is a summer evening or a
night run depending on the month.
Computed for Bristol at 51.4540°N 2.5880°W, on the 15th of each month in 2026.
Times are local — British Summer Time where it applies — and the clocks
go back on 25 October 2026, after which sunset on the Monday is
16:54. First and last light are civil twilight.
The numbers behind the chart
Month
First light
Sunrise
Sunset
Last light
Daylight
January
07:30
08:09
16:30
17:09
8h 22m
February
06:49
07:24
17:25
18:00
10h 01m
March
05:51
06:24
18:14
18:48
11h 50m
April
05:39
06:14
20:06
20:42
13h 52m
May
04:37
05:18
20:55
21:37
15h 37m
June
04:05
04:52
21:29
22:16
16h 36m
July
04:26
05:10
21:21
22:05
16h 10m
August
05:18
05:55
20:32
21:10
14h 37m
September
06:11
06:45
19:24
19:58
12h 40m
October
07:00
07:34
18:17
18:50
10h 43m
November
06:51
07:28
16:21
16:58
8h 53m
December
07:29
08:09
16:01
16:41
7h 52m
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 Floating Harbour is the obvious start: flat, paved and a continuous loop of about four miles round the water through the middle of the city. For distance without a road crossing, the Bristol and Bath Railway Path runs thirteen miles east on a former railway. Ashton Court and Leigh Woods give you trail and climbing across the Avon Gorge, and the Downs are 400 acres of open grass above Clifton. All nine routes above start in Bristol, and RunFlex will redraw any of them from your own front door.
Where can I run 5K in Bristol?
The Floating Harbour is the obvious 5K in Bristol: flat, paved, traffic-free for most of the way round, and the full circuit is a little over 5K on its own. The Downs are the alternative if you want grass and space rather than water.
Is there a traffic-free running route in Bristol?
The Bristol and Bath Railway Path. Thirteen miles from the centre to Bath on a sealed former railway with no road crossings, so it works as an out-and-back at any distance you choose. Much of the Floating Harbour circuit is traffic-free too, though not all of it.
Where can I run in Bristol without a car?
Every route on this page starts inside Bristol, so none of them needs a car. Temple Meads sits at the eastern end of the Floating Harbour and within a few minutes of the Railway Path’s start, and Clifton Down station is a short jog from the Downs and the suspension bridge.
Where is Bristol parkrun, and what should I run the rest of the week?
Ashton Court parkrun is at 9am on Saturday, and it is not a flat one — the course climbs through the estate’s deer park. Eastville parkrun is the flatter alternative. Midweek, Bristol and West AC and Westbury Harriers both train in the city.
What is the flattest run in Bristol?
The flattest run in Bristol of the nine on this page is The old city and Brandon Hill, at 58 m of climb over 6.7 km and never steeper than 5.7%. Bristol and Bath Railway Path to Fishponds is next, at 90 m over 10.3 km. Both figures are measured off the drawn line rather than estimated from the map.
How hilly is Bristol?
Bristol is rolling rather than hilly. Measured across the nine routes on this page, the flattest carries 8.7 metres of climb per kilometre and the hilliest 21.7, and the steepest single pitch on any of them is 11%. The climbing sits in the valley sides rather than in any one hill.
When does it get dark in Bristol?
In Bristol the sun sets at 16:01 in mid-December and 21:29 in mid-June. The clocks go back on 25 October 2026, and sunset on the Monday after is 16:54, so from late October 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 Bristol 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.