The half marathon is one of the most popular goals among runners. At 21.1 km, it is demanding enough to require proper preparation while remaining accessible to runners who build a consistent routine.<\/p>\n\n\n\n
One question comes up more than any other: how long does it take to train for a half marathon?<\/strong><\/p>\n\n\n\n For most runners preparing for the distance for the first time, the most sensible answer is at least 12 weeks<\/strong>. World Athletics recommends allowing a minimum of 12 weeks and gradually increasing the distance covered. It also offers a beginner programme based on three weekly sessions, focused on consistency, confidence and endurance.<\/p>\n\n\n\n However, the right training period depends primarily on your starting point. Someone who already runs regularly and can comfortably complete 10 km will need a different plan from someone who has only recently started running.<\/p>\n\n\n\n It is possible, but it is not generally the best option for someone starting from zero.<\/p>\n\n\n\n An eight-week plan may be appropriate if you already:<\/p>\n\n\n\n In this situation, the eight weeks can be used to gradually extend your long run, practise hydration and nutrition and become comfortable running for longer periods.<\/p>\n\n\n\n If you are still alternating short intervals of running and walking or struggle to train consistently, choosing a later event will give you a more realistic preparation period.<\/p>\n\n\n\n Ten weeks can be enough for someone with previous running experience who has not yet completed 21.1 km.<\/p>\n\n\n\n Ideally, you should already be able to run between 8 and 10 km at a controlled effort. From there, you can gradually extend your long run while keeping most of your other sessions shorter and easier.<\/p>\n\n\n\n Avoid turning every session into a test. The purpose of training is not to prove every weekend that you can already complete a half marathon. It is to develop enough endurance to arrive at the starting line healthy and prepared.<\/p>\n\n\n\n For many runners, 12 weeks provide a good balance between progression and recovery.<\/p>\n\n\n\n This gives you time to:<\/p>\n\n\n\n Training plans do not need to look identical for everyone. World Athletics provides options for different experience levels and incorporates activities such as strength training, yoga and swimming alongside running.<\/p>\n\n\n\n A longer preparation period is advisable when:<\/p>\n\n\n\n Having more weeks does not necessarily mean doing more training. It means having enough time to progress without pressure and repeat a week when your body needs longer to adapt.<\/p>\n\n\n\n A beginner plan can be built around three main weekly sessions.<\/p>\n\n\n\n This should be completed at a comfortable pace at which you could still hold a conversation. Easy sessions allow you to build mileage without creating excessive fatigue.<\/p>\n\n\n\n This may include short changes of pace, a progressive run, hills or a few controlled minutes near your intended race pace.<\/p>\n\n\n\n It does not need to be extremely intense. Its purpose is to introduce variety and gradually improve your running efficiency.<\/p>\n\n\n\n The long run is the main reference point of half marathon preparation. Its duration gradually increases, helping both your body and mind adapt to longer periods of exercise.<\/p>\n\n\n\n It is also the best opportunity to test the shoes, clothing, hydration and nutrition you intend to use on race day.<\/p>\n\n\n\n Strength or cross-training can also be included, provided that rest and recovery remain part of the programme.<\/p>\n\n\n\n You do not need to be fast, but some consistency is important.<\/p>\n\n\n\n You are probably ready to start a half marathon plan when:<\/p>\n\n\n\n If you are not there yet, the half marathon is not out of reach. You may simply benefit from spending a few additional weeks building your base first.<\/p>\n\n\n\n For runners beginning their preparation at the end of July 2026, the calendar offers several events with different amounts of training time available.<\/p>\n\n\n\n 12 September 2026 | Altura, Castro Marim<\/strong><\/p>\n\n\n\n This night race consists of four laps of a road circuit, starting at 20:00 with a two-and-a-half-hour cut-off. The programme also includes a 10.5 km minimarathon, providing an alternative if you reach race week without feeling ready for the full 21.1 km.<\/p>\n\n\n\n 13 September 2026 | Benedita, Alcoba\u00e7a<\/strong><\/p>\n\n\n\n The event includes a half marathon, 10 km race, 5 km walk and Kids Run. The half marathon has a three-hour time limit, and registrations made through its RaceFinder page are managed directly by RaceFinder.<\/p>\n\n\n\n 20 September 2026 | Loures and Odivelas<\/strong><\/p>\n\n\n\n The race connects the two municipalities on an internationally certified course. The programme also includes a 10 km race, a 5 km option and children\u2019s races, allowing participants to adjust their goal if their preparation does not progress as expected. The half marathon cut-off is three hours.<\/p>\n\n\n\n These events are more suitable for runners who already train consistently. Those still developing their base should consider a race in October or November.<\/p>\n\n\n\n 27 September 2026 | Coimbra<\/strong><\/p>\n\n\n\n The certified half marathon course has approximately 66 metres of total elevation gain. The event also offers a 10.3 km race and a 10 km walk. Its relatively flat profile may appeal to runners looking for a controlled first experience or an opportunity to target a faster time.<\/p>\n\n\n\n 4 October 2026 | Ovar<\/strong><\/p>\n\n\n\n This established event includes a certified half marathon, a competitive 10 km race, a walk and a children\u2019s race. Its range of distances makes it suitable for friends or families arriving with different objectives.<\/p>\n\n\n\n 11 October 2026 | Lisbon<\/strong><\/p>\n\n\n\n The race begins on the Vasco da Gama Bridge and finishes at Pra\u00e7a do Com\u00e9rcio. It has a maximum capacity of 11,000 runners, different starting corrals and a three-hour cut-off. It is a strong option for anyone looking for a large-scale race and an iconic urban course.<\/p>\n\n\n\n 18 October 2026 | Leiria<\/strong><\/p>\n\n\n\n With a half marathon, 10 km race, walk and Kids Race, the event combines competition with family participation. The 21 km race has a three-hour cut-off, aid stations along the route and registrations managed directly by RaceFinder.<\/p>\n\n\n\n 8 November 2026 | Cascais, Oeiras and Lisbon<\/strong><\/p>\n\n\n\n The point-to-point coastal course starts at Casino Estoril and finishes at Pra\u00e7a do Imp\u00e9rio in Lisbon. In addition to the half marathon, the programme includes a 10 km race and a relay, giving runners other ways to participate without completing the full distance individually.<\/p>\n\n\n\n A half marathon does not begin at the starting line. It begins when you select an event that suits your experience, availability and current fitness.<\/p>\n\n\n\n For runners with an established routine, eight or ten weeks may be enough to turn an existing base into race-specific preparation. For a first half marathon, 12 weeks remains a more balanced target. Those who are new to running or returning after a break will normally benefit from choosing an event 14 to 16 weeks away.<\/p>\n\n\n\n The most important factor is not following an exact number of weeks. It is training consistently, respecting recovery and arriving on race day healthy.<\/p>\n\n\n\nCan you train for a half marathon in eight weeks?<\/h3>\n\n\n\n
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What about ten weeks?<\/h3>\n\n\n\n
Twelve weeks: a balanced option for beginners<\/h3>\n\n\n\n
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When should you allow 14 to 16 weeks?<\/h3>\n\n\n\n
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What should a half marathon plan include?<\/h3>\n\n\n\n
One easy run<\/h3>\n\n\n\n
One focused session<\/h3>\n\n\n\n
One long run<\/h3>\n\n\n\n
How do you know you are ready to begin?<\/h3>\n\n\n\n
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Which half marathon should you choose in Portugal?<\/h2>\n\n\n\n
Around six to eight weeks: for runners with an established base<\/h3>\n\n\n\n
17th Half Marathon of the Municipality of Castro Marim \u201cFlor de Sal\u201d<\/a><\/h3>\n\n\n\n
Half Marathon da Benedita<\/a><\/h3>\n\n\n\n
Half Marathon Loures\u2013Odivelas\u2013Loures<\/a><\/h3>\n\n\n\n
Around nine to eleven weeks: for runners with 10K experience<\/h3>\n\n\n\n
Ameal Half Marathon 2026<\/a><\/h3>\n\n\n\n
Half Marathon de Ovar<\/a><\/h3>\n\n\n\n
Hyundai Lisbon Half Marathon<\/a><\/h3>\n\n\n\n
Twelve weeks or more: stronger options for a first training cycle<\/h3>\n\n\n\n
Half Marathon Leiria<\/a><\/h3>\n\n\n\n
Cascais Oeiras Lisboa 2026<\/a><\/h3>\n\n\n\n
The best plan begins with a realistic race date<\/h3>\n\n\n\n