CHIANG MAI TO NAN
THE ROUTE 1148 GUIDE

WHY RIDERS SAY NAN

There is a community poll of the best roads in Northern Thailand that riders here have been pointing at for over a decade. The interesting thing is not the winner. It is that every one of the top five roads is in Nan province — the 1148 first, then the 1091, the 1256 over Doi Phu Kha, the 1081 and the 1080.

Five out of five, in a province most visitors have never heard of, chosen by people who ride the whole North. Mae Hong Son is the famous one and deserves to be. Nan is the one riders keep going back to, and the reason is simple arithmetic: it is far enough east to be off the tourist track, and the roads were built through mountains rather than around them.

It is also a corridor whose information has quietly rotted. Of the guides we checked before writing this, several are gone, one domain no longer resolves, and not one had the length of the headline road right. That is the gap this page is here to close.

FOUR WAYS TO GET THERE

Chiang Mai to Nan is not one journey, it is a choice, and the choice is worth more thought than the map suggests. All four below are measured door to door, old city to Nan town, with the extra time this terrain actually takes added on top of the routing engine’s figure.

The row worth staring at is the second one. Going via Phayao and the 1091 is the shortest way to Nan — 300 km against 328 — and also the slowest. When a route is 28 km shorter and an hour longer, the map is telling you something about the terrain that the distance alone hides. The 1091 is a mountain road, and it is second on that top-five list.

ROUTE 1148 — HOW LONG IS IT, REALLY?

Route 1148 is 113.079 km long — kilometre post 0+000 at the Highway 101 junction in Tha Wang Pha, kilometre post 113+079 at Ban Yuan on the Chiang Kham side. We checked it four ways before printing it: the Department of Highways register, the department’s own kilometre-marker table, an independent sum of the mapped road (113.5 km) and a routing trace end to end (113.2 km). Four methods, one answer.

You will also see other figures for this road — 91 km is the common one, and 70 and 120 turn up too. The 91 is a genuine measurement of a shorter stretch, between two intermediate junctions rather than the full highway, and the difference is worth knowing about for one practical reason only: fuel and daylight. If your plan assumes 91 km end to end, add 22.

WHAT IT IS ACTUALLY LIKE

Sealed the whole way — there is no unpaved section of the 1148 in current map data, and the most recent rider report we could find describing the surface, from 2023, calls it good. It climbs and drops continuously between the Nan valley and the Phayao plain, which is what the riders who vote for it mean when they call it a roller coaster.

Ban Pha Lak sits at the midpoint, 45 km from either junction, with a village shop — the natural half-way stop in either direction, and 61 km, about an hour, from Pua. Along the way you pass the Phu Langka ridge near the Chiang Kham end and the Iu Mien village of Ban Sakoen in the middle.

Which direction? Nobody has published an answer, including the thread that asks the question and then leaves it hanging. Here is our reasoning rather than a fact: the Nan end is the flatter end, so riding east to west — Tha Wang Pha towards Chiang Kham — front-loads the easy kilometres and puts the sustained mountain work in the middle, finishing on the plain. Ride it the other way and you finish on the hardest part. Neither is wrong.

One thing to know for later: there is a Department of Highways project to widen part of the 1148 from two lanes to four. As of the latest documents we can see it is at survey-and-design stage with no construction date. The road riders love is on a list. It is not on a schedule.

FUEL, MEASURED

You will read that the 1148 has no fuel and no villages on it. That is the other thing this road gets wrong in print. We pulled every mapped fuel point in the corridor and measured how far along the road each one sits, and then found a rider who had bought fuel at one of them. Here is what is actually true.

So the honest sentence is not “there is no fuel”. It is that range is not the problem here — octane, opening hours and payment are. Any modern motorcycle covers 113 km on a tank without thinking about it. What you do not want is to plan on buying fuel in the middle of the 1148 and find a drum and a hand pump with nobody home. Fill in Tha Wang Pha or Chiang Kham, ride the road on a full tank, and the whole question disappears.

THE NAN LOOP, LEG BY LEG

Getting to Nan is half of it. The other half is the circuit out of Nan town that most riders come for: north on the 101 to Pua, over Doi Phu Kha to the salt wells at Bo Kluea, then the long way back down the 1081. 203 km, and a full day — read the times, not the distances.

ROUTE 1256 — OVER DOI PHU KHA

Officially 46.596 km, Pua to Bo Kluea, and third on that top-five list. It is the shortest road on the loop and the one that takes longest, because it is a pass rather than a road with hills on it.

We are not going to tell you what its surface is like today. Reports on this one road have contradicted each other for well over a decade — the same stretch called immaculate and broken-edged in the same season — and after the August 2026 flood the honest answer is even less settled than usual. Treat the 1256 as the road on this loop where you slow down, and read the dated box at the top of this page before you plan a day around it.

If you are here in February or March, the Chomphu Phukha tree the road is named for stands about 30 km up the hill from Pua beside the shrine. It flowers for roughly a fortnight a year and then stops, which is a good description of Nan generally.

ROUTE 1081 — BO KLUEA AND THE SALT WELLS

The 1081 is 157 km of highway on paper — the long north–south spine of eastern Nan, running all the way to the Lao border at Huai Kon. The section riders mean when they say “the 1081” is the 73 km from Bo Kluea down to Santi Suk, and it is fourth on the list. Allow two to two and a half hours; it does not let up.

Bo Kluea means “salt wells”, and that is not decoration: they are inland mountain brine wells, hundreds of kilometres from any sea, worked for centuries and still worked now. It is the reason the district exists.

We have deliberately not printed opening hours or a fee for the wells. We could not verify either, and after the flood we would not trust a pre-August answer anyway. Ask when you are in Pua.

WHERE YOU SLEEP

Nan town has a hundred-plus places to stay and you do not need to book far ahead outside December and January. Pua has a real choice but a small one — book it in the cool season. Bo Kluea is the bottleneck: a handful of listings for the loop’s natural overnight stop. If your plan depends on sleeping there, book it first and build the rest of the trip around it. We have not printed prices on this corridor because no 2025–26 price we found held up to checking.

PHU CHI FA

The cliff-edge viewpoint over the Mekong plain sits in eastern Chiang Rai, on the Lao border, and it is the one thing on this corridor that a Nan trip is routinely built around. It is also, oddly, missing from every Nan route guide we fetched — which is why the first number below does not exist anywhere else.

Nan to Phu Chi Fa is 219 km and about five and a half hours. A full day, not an afternoon. The route runs the 101 north, onto the 1148 as far as Chiang Kham, then the 1021, the 1222 and finally the 1093 — the border ridge road, which is the one that actually climbs the mountain. The 1148 is the connector on that day, not the access road, and it is worth saying because plenty of people assume otherwise.

TWO ACCESS RULES NOBODY WRITES IN ENGLISH

• A standing annual closure, 1 July to 31 August. Visiting and staying at the summit viewpoint stop for those two months. It has been the same two dates in the years we could confirm, which is what makes it a rule rather than an incident.
• On peak dates in December and January, you cannot ride up for sunrise. Private cars and motorcycles are banned from the summit road between 04:30 and 09:00 on the listed dates; everyone parks below and takes a community shuttle from one of seven pick-up points. The park’s stated reason is the steep grade of the ascent and the lack of parking at the top. The listed dates for the last season clustered on December weekends, over New Year and into mid-January.

We are not going to tell you the state of play on the day you read this. No notice for the coming season has been published that we can verify, the peak-date rule has to be assumed to return, and this is precisely the sort of detail that turns a 05:00 alarm into a wasted morning. The park answers its phone — a call ahead is the only reliable way to know, whoever you ride with.

THE SUNRISE, IN NUMBERS

Most pages say “around 6:30 in winter”. That is right for early December and roughly twenty minutes out by the middle of January, which is the difference between arriving early and standing on an exposed ridge in the dark for an hour. These are computed for the viewpoint’s own coordinates.

• The walk is 700 to 760 m from the main car park and takes twenty to thirty minutes, steep at the end. If you see 1.5 km quoted, that is measured from the village below, not from the car park. Start walking forty to sixty minutes before the sunrise time above — not at 05:00.
• It is colder than anyone tells you. The January average daily minimum up there is 10.9 °C and December’s is 11.4 °C — five to six degrees below Nan town on the same night. You leave a warm valley and stand still on an exposed ridge before dawn. Bring the jacket you think you will not need.
• Sleep at the mountain. Chiang Rai is two to two and a half hours away, so a sunrise day-trip means a 03:00 start on an unlit mountain road. The villages below the trail have simple guesthouses, homestays and campsites — and no cash machines. Bring cash, and book for December and January.

What we have not printed: an elevation, an entrance fee or a shuttle fare. The elevation figures in circulation disagree by nearly 200 m and no source reconciles them; the fee most English pages quote belongs to a different viewpoint 20 km away. When we can verify them, they will appear here.

WHEN TO RIDE IT

Ten-year monthly rainfall means for the three places on this route that decide whether a trip works. Millimetres per month.

HOW TO RIDE IT WITH US

Nan is a long way from Chiang Mai and the roads that make it worth the distance are the ones with the least around them. That is a good argument for going with someone who has ridden them, and an even better one this season, with a flood-damaged pass and a viewpoint whose access rules change without an English-language announcement.

If you have never ridden a Thai mountain road before, do not start here. Ride the Samoeng Loop first, or the Mae Hong Son Loop, and come east once the corners have stopped being a problem. Licence and insurance detail is on our Before You Ride page.