Los Molinos Backyard Ultra: what to expect in 2027

Plan your race pace

Los Molinos will host the sixth edition of its Backyard Ultra on Jan. 30, 2027, a mountain race where each loop leads to another start and the competition continues as long as runners remain in the field. The date is confirmed, and available listings show several formats, from a 6.706-kilometer loop to ultradistance options.

Information published so far does not specify the start time, entry fee or registration status for 2027. The date alone does not complete the event details: information from the previous edition helps explain the race, but should not be mistaken for confirmed details about the next one.

A winter race in the Madrid mountains

The race will take place in Los Molinos, in the Community of Madrid, in the middle of winter. The Jan. 30 date places it in a season when mornings can be cold and trail conditions can change with rain, dampness or frost. That matters for an outdoor competition, although no weather forecast or specific information about course conditions has been published yet.

The 2027 event will be the sixth edition, according to the information available. The closest previous event mentioned in the reference material was the fifth edition, held on Jan. 31, 2026. That year, the start and finish were at the municipal sports center and activity began at 9 a.m., but those details describe the previous race and do not confirm the 2027 start location or time.

The location suggests a mountain setting, but it is important to distinguish the general setting from specific course information. The Guadarrama Mountains shape the area’s landscape, while the exact route for the next edition has not been detailed in the available information. No official map, cumulative elevation gain or details about each surface type have been provided.

What it means to compete in a Backyard Ultra

A Backyard Ultra is usually organized around repeated loops that start at regular intervals, typically once an hour. The challenge is not simply to cover a long distance, but to complete each loop within the allotted time and be ready for the next start. In the traditional format, the competition continues until one participant remains able to complete the course; still, the specific rules depend on each race organizer.

This setup changes how effort feels. One loop may seem manageable on its own, but repetition, limited recovery and the passing hours mean that each return to the start line calls for a new decision. Runners must manage both pace and the time between loops; starting too fast can take its toll, and using the entire break to recover does not guarantee that the body will respond the same way on the next round.

In Los Molinos, the Backyard name and information from earlier editions point to this loop-based format, but a complete rulebook for 2027 has not been released. For that reason, the exact interval, elimination criteria and maximum number of loops should not be treated as confirmed until the organizer publishes the event conditions. These details shape both race strategy and its actual duration.

Announced distances and formats

Available 2027 listings show a pairs format covering 6.706 kilometers per loop, a marathon-distance option of 46.942 kilometers associated with seven loops, and a 100-kilometer ultra option. The seven-kilometer figure that appears in some calendars seems to round the length of one loop; it does not mean every format covers only that distance.

The options differ considerably. One 6.706-kilometer loop is shorter than seven loops, while the ultra format is presented as a longer challenge. However, the supplied information does not explain in detail how pairs compete, whether the formats share a start or what limits and conditions apply to each entry. Distance alone does not explain all the rules of a Backyard Ultra.

There is also a discrepancy in figures that should be read carefully: 46.942 kilometers equals seven loops of 6.706 kilometers, while the ultra is listed as 100 kilometers. That figure should not be used to infer an exact loop count or expected duration unless the rules confirm it. Before choosing a format, runners should check the official distance, participation arrangements and rules specific to the 2027 edition.

A course description is still to come

A full description of the 2027 route has not yet been published. The 2026 edition was presented as an approximately 6.706-kilometer loop with sections of pavement, track and trail, a mix that alternates firm surfaces with more uneven ones. That is useful background on the race’s character, although it does not confirm that the route will remain unchanged.

Surface variety affects how a loop feels. Pavement generally offers a more consistent stride; tracks and trails can require greater attention, especially if darkness, mud or moisture reduce visibility and grip. Without a map or elevation data, it is not possible to describe precisely the climbs, descents or technical sections planned for 2027.

In a loop-based race, knowing the course is no minor detail. Information about distance, footing and exposed sections helps runners assess how long each round might take and how accumulated effort will change. Once the official details are released, the map and elevation profile will be more reliable than any estimate based on previous editions. Until then, the route should be considered unconfirmed.

Registration, race bibs and missing details

The race date is confirmed, but the information reviewed does not say whether 2027 registration is open, and it does not publish an entry fee or official registration link. It also gives no details about the number of bibs, whether there will be limits by format or whether a transfer fee will apply. Without those details, no specific price can be given and available spots cannot be confirmed.

Mountain races can have different entry conditions depending on distance or format. Minimum age, required documents, insurance and bib-transfer rules are matters for the organizer to set out in the regulations. Those conditions are not included in the reference information for this edition, so any specific requirement should be checked in the official event notice before registering.

A private sale is not the same as an organizer-approved change of name. If someone cannot attend, the valid option depends on what the race allows; handing over a bib without permission could leave the new runner without coverage or unable to compete. With no 2027 transfer rules published, it is wise not to assume that registration can be transferred or that a particular process or fee exists.

Cold weather and duration shape the challenge

A winter start in the mountains can mean low temperatures early in the day and changing conditions later, although the exact weather will only become clear closer to race day. In a loop format, exposure can last many hours and, in the longest option, span different parts of the day. The potential duration is part of the challenge, but no official start time or schedule has been published for 2027.

Moisture can also change how cold the air feels and how trails behave. A section that is straightforward when dry may become more slippery after rain, while cold conditions can make breaks between loops feel longer. These are general considerations for winter races, not a forecast for Los Molinos: the weather and trail conditions cannot be predicted with certainty this far ahead.

Preparing for an event like this involves more than adding miles. The format calls for learning to control effort, eat and drink in a way that suits the duration, and manage breaks without getting excessively cold. These are general considerations, not individualized advice; needs vary among runners and depend on the chosen distance. The organizer’s rules and medical information should define the safety conditions that apply to each format.

How to interpret the 2027 event details

The most reliable information available so far combines a confirmed date with distances listed in a race calendar. The event is scheduled for Jan. 30, 2027, in Los Molinos, and is listed as the sixth edition. By contrast, there is not enough information to confirm the time, exact start location, entry fee, official registration page or course map. Separating these two levels of certainty helps prevent a listing from being mistaken for an official announcement.

It also matters that race calendars may round distances or summarize several formats under one figure. That is why references to seven kilometers appear alongside the precise 6.706-kilometer loop, and 46.942 kilometers is listed for seven loops. The more precise figures help explain the options, but the organizer must confirm the official race distance and how it will be listed for each bib.

Event information may expand in the months before the race, when the regulations and logistical details are published. Until then, it is not possible to confirm the 2027 gathering point, schedule, available services or access arrangements. The previous edition provides context, but does not replace an official update: each race edition can change its route, schedule and conditions.

A race whose finish is built one loop at a time

The appeal of a Backyard Ultra lies in the fact that the final distance is not always known in advance. Runners choosing one loop or a limited-distance format face a defined goal, while the ultra competition unfolds with each new start. In both cases, time matters as much as mileage: consistency and the ability to start again are central to the format.

In Los Molinos, the sixth edition already has a date and a range of distances that includes one 6.706-kilometer loop, seven loops totaling 46.942 kilometers and a 100-kilometer option. The event will take place in winter in a mountain setting, but details that will shape the practical experience remain incomplete. Schedules, course, prices and registration still need confirmation before runners can plan precisely.

The next decisive update will be the publication of the official 2027 conditions. That document will clarify the formats, show whether the route retains the surfaces used in previous editions and explain the start, participation and safety rules. Until then, the firm detail is the date: Jan. 30, 2027, in Los Molinos, a day when every loop can open the door to the next.