What Does NOBO and SOBO Mean in Hiking?
NOBO and SOBO are thru-hiking abbreviations for northbound and southbound. A NOBO hiker is travelling north along a long-distance trail, while a SOBO hiker is heading south. The direction you choose can affect the weather, snow conditions, water availability, crowds and how much time you have to complete the trail.
You will hear these terms most often on major long-distance trails such as the Pacific Crest Trail (PCT), Appalachian Trail (AT) and Continental Divide Trail (CDT). They are also used on other trails that have an obvious north-to-south orientation.
Whether it is better to hike NOBO or SOBO depends entirely on the trail, the time of year and the kind of experience you want. For some trails one direction gives you a much larger weather window, while hiking in the opposite direction can mean fewer people and a much quieter experience.
| Direction | Meaning | Typical PCT Start | Main Advantage |
|---|---|---|---|
| NOBO | Northbound | Mid-April to early May | Longer traditional hiking window and more social |
| SOBO | Southbound | Late June to early July | Quieter trail and cooler Southern California later in the hike |
Why Is It Called NOBO/SOBO Hiking?
NOBO is simply an abbreviation of northbound, while SOBO means southbound. The terms are particularly common among thru-hikers because saying you are “NOBO on the PCT” immediately tells another hiker which direction you are travelling.
You might also hear somebody described as a “NOBO” or “SOBO,” so a group of southbound thru-hikers would simply be SOBOs. There are similar bits of long-distance hiking shorthand, but NOBO and SOBO are probably two of the first you will encounter if you start researching a major thru-hike.
Why Does Hiking Direction Matter?
On a short local trail, hiking north or south may make almost no difference. On a trail that takes four, five or six months to complete, however, your direction can determine which season you experience in each mountain range.
That can affect snowpack, river crossings, temperatures, wildfires, water availability and whether services are still open when you reach a trail town. Your direction also determines whether you are hiking alongside hundreds of other people following roughly the same schedule or moving against the main flow of hikers.
For very long trails, choosing the right direction is really about trying to move through each section during the best possible hiking weather.
Which Trails Use NOBO and SOBO?
The terminology is especially common on the three major north-south thru-hiking trails in the United States:
- Pacific Crest Trail (PCT)
- Appalachian Trail (AT)
- Continental Divide Trail (CDT)
You will hear the same language on plenty of other long trails in the US and around the world. The Te Araroa in New Zealand is one example, and someone walking the length of Britain from Land’s End to John o’ Groats could equally describe themselves as travelling northbound.
You don’t need to be attempting a complete thru-hike to use the terms either. Someone walking a long PCT section northwards can still describe themselves as NOBO.
NOBO vs SOBO on the Pacific Crest Trail
The Pacific Crest Trail is probably the best example of why hiking direction matters. According to the Pacific Crest Trail Association, more than 90% of PCT thru-hikers travel northbound, and there are good reasons why that has become the traditional direction.
That doesn’t make SOBO wrong. A southbound PCT hike can be brilliant, and there are some genuine advantages if you have the experience and fitness for the narrower weather window.
Walking NOBO on the PCT
Most northbound PCT thru-hikers start at the Mexican border from around mid-April through early May. The timing is a balancing act: start too early and there can still be dangerous snow in Southern California before you even reach the Sierra Nevada, but start too late and temperatures in the desert can become seriously hot.
Heading north in spring gives you time to cross Southern California before summer heat reaches its worst and then approach the Sierra as the winter snowpack begins melting. Conditions vary enormously from year to year, though, so there is no magic calendar date that guarantees easy snow and river crossings.
One of the biggest advantages of going NOBO is the social side. Because more than 90% of PCT thru-hikers travel this way, you repeatedly meet people following a similar schedule. Friendships form, trail towns are full of hikers and there is a much greater chance of having other people around if something goes wrong.
That can also be a disadvantage. Popular campsites can get busy, trail towns can be crowded and anyone hoping for months of solitude may find the NOBO “bubble” a little too social.
Water is another important consideration, but I wouldn’t describe a NOBO hike as having an abundance of water. Water scarcity is always a serious issue in Southern California. The advantage is that NOBO hikers cross the desert during spring, when seasonal sources are generally more useful than they are for a SOBO hiker reaching the same country in autumn. Either way, you need to research current sources and carry enough water rather than relying on caches.
The biggest deadline comes at the other end of the hike. Northbounders need to reach Washington and Canada before winter returns to the northern mountains. Snow has closed the PCT in Washington as early as September, and the PCTA recommends planning to be off the trail by October in a normal year.
NOBO PCT advantages:
- Largest and most established thru-hiking community.
- Traditional mid-April to early-May start window.
- Cross Southern California before the worst summer heat.
- Seasonal desert water sources are generally better than they will be in late autumn.
- More hikers around for company and support.
NOBO PCT disadvantages:
- Much busier than hiking southbound.
- Popular campsites and trail towns can become crowded.
- Starting too early can put you into serious snow in Southern California and the Sierra.
- You need to reach Washington before autumn snow closes the weather window.
Walking SOBO on the PCT
Southbound PCT hikers normally start in late June or early July. The northern end is not as simple as walking across the Canadian border, because entering the United States from Canada via the PCT is illegal. Most SOBO thru-hikers instead start from Hart’s Pass in Washington, hike north to touch the Canadian border and then turn around to begin the long journey south.
This immediately makes a SOBO start more demanding. Snow can remain on high North Cascades passes into July or even later during heavy snow years, and the PCTA warns that early-season SOBO travel can involve steep snowfields, difficult navigation and genuine mountaineering conditions.
You therefore need enough experience to deal with whatever snow remains while also waiting long enough for conditions to improve. Wait too long and you start eating into the time available to get through the Sierra Nevada before the next winter begins.
The main attraction is solitude. Instead of travelling with the huge northbound wave, you are part of a much smaller group moving south. Campsites are generally quieter, towns aren’t overwhelmed by thru-hikers and the entire trip can feel more like a personal wilderness journey.
The weather also changes in interesting ways. By the time a SOBO hiker reaches much of California, the worst mosquito season has passed, and Southern California is reached in autumn rather than during summer heat. That is a genuinely nice way to finish the trail.
The price you pay is a more awkward weather window. The PCTA recommends aiming to reach Kennedy Meadows South by late September or early October because significant Sierra snowstorms can begin around that time. Some Sierra resupply services may also be closing for the season.
Water can become more difficult farther south too. By autumn, natural sources in Southern California can be sparse and water caches should never be treated as guaranteed. A SOBO hiker may need to make longer water carries and travel farther off trail to reliable sources.
SOBO PCT advantages:
- Far fewer thru-hikers and much more solitude.
- Quieter campsites and trail towns.
- Much of California is reached after the worst mosquito season.
- Southern California is crossed in cooler autumn conditions.
- A very different experience from following the traditional NOBO herd.
SOBO PCT disadvantages:
- Shorter and less forgiving weather window.
- Potentially serious snow travel in Washington immediately after starting.
- More difficult navigation if snow is still covering the trail.
- Need to get through the high Sierra before early winter storms return.
- Some late-season resupply services may be closed.
- Water becomes less reliable in Southern California during autumn.
Is NOBO or SOBO Better on the PCT?
For most people attempting their first PCT thru-hike, I would choose NOBO. The weather window is easier to work with, the logistics are more established and there are far more other thru-hikers around. That is presumably why more than 90% of people already choose to hike it in that direction.
SOBO makes more sense if you specifically want a quieter trail and already have the skills and confidence to deal with potentially difficult snow travel at the beginning. You also need to be comfortable keeping enough pace through the season to reach the Sierra before winter starts closing the window from the other direction.
What About a Flip-Flop Thru-Hike?
There is also a third option: you don’t have to hike the whole trail continuously in one direction. A flip-flop means hiking sections in a different order, often skipping an area because of snow or weather and returning to complete it later.
The PCTA specifically recommends considering flip-flops as a way of avoiding difficult early-season snow while still completing the entire trail during one season. It complicates logistics and sometimes requires additional local permits, but it can make much more sense than forcing yourself through dangerous conditions simply because you are determined to maintain a perfectly continuous NOBO or SOBO line.
NOBO vs SOBO: Which Direction Should You Hike?
There isn’t a universal answer because the best direction depends on the trail. Look at when snow clears, when winter normally returns, where water becomes scarce and how long you realistically have to finish.
For the PCT, I think NOBO remains the sensible choice for most thru-hikers. SOBO is quieter and has some excellent advantages later in the journey, but the North Cascades can throw you straight into difficult snow and the overall weather window gives you less room for messing around.
Whichever direction you choose, check current snow, trail closures, water reports and permit requirements instead of relying entirely on dates from somebody else’s thru-hike. Every year is different, and conditions matter far more than whether the calendar says it is normally time to start.
We hope this NOBO vs SOBO hiking guide helped explain what the terms mean and why direction matters on a long-distance trail.
