Promptkoi

Bold Marathon Event Poster

Flux
By Varun Sharma Tested with Flux Flux.1 dev

Bold Marathon Event Poster is a tested Flux Flux.1 dev prompt for poster work. It runs at Flux Flux.1 dev · Aspect ratio 2:3 · Steps 28 · CFG scale 3.5, and ships below with the exact prompt text, usage notes, and 2 pasteable variations.

Last tested: July 2026 with Flux Flux.1 dev

Part of the Flux prompt library.

Bold orange-and-black marathon poster template, a running silhouette mid-stride with motion streaks and an empty headl…
Bold Marathon Event Poster — Flux Flux.1 dev, Aspect ratio 2:3

Prompt 

A bold marathon event poster template, portrait orientation, a large empty solid banner across the top left blank for the event name, a dynamic running silhouette caught mid-stride below, diagonal motion streaks trailing behind the runner, energetic orange and black palette, flat vector graphic style, high-energy race-day event template, no lettering

Settings

Model
Flux Flux.1 dev
Aspect ratio
2:3
Steps
28
CFG scale
3.5

How to use this prompt

Motion is the entire point, so the runner has to be caught mid-stride — one leg driving forward, arms pumping — with the speed streaks trailing behind in the direction of travel. A static, standing figure kills the energy instantly; spell out 'mid-stride, motion streaks trailing behind'. Keep the top banner an empty solid block rather than a 'text area', or Flux stamps in fake event names; drop your real race name and date on top later. Orange-on-black delivers the high-energy race-day feel — a single hot accent color against black reads far bolder than a multicolor scheme that dilutes the impact.

Variations to try

  • Cycling race — swap the runner for a cyclist silhouette and use teal-on-navy
  • Finish-line hero — add a radial sunburst behind the runner for a race-day hero poster
bold flat design poster marketing

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For developers — copy this prompt as JSON 
{
  "title": "Bold Marathon Event Poster",
  "prompt": "A bold marathon event poster template, portrait orientation, a large empty solid banner across the top left blank for the event name, a dynamic running silhouette caught mid-stride below, diagonal motion streaks trailing behind the runner, energetic orange and black palette, flat vector graphic style, high-energy race-day event template, no lettering",
  "model": "Flux",
  "model_version": "Flux.1 dev",
  "settings": {
    "aspect_ratio": "2:3",
    "steps": 28,
    "cfg": 3.5
  },
  "style_tags": [
    "bold",
    "flat-design"
  ],
  "use_case_tags": [
    "poster",
    "marketing"
  ],
  "source_url": "https://promptkoi.com/prompts/flux/bold-marathon-event-poster/"
}

The whole library is available as an open JSON dataset · developer docs.