Planner-First Experience

Plan a race soundtrack before race day, directly on the route.

Fixture Songs are projected onto the London Marathon Demo Race using constant pace from your goal finish time, with route coverage shown in the timeline and on the map.

Open Surface

Planner

Initial Race

London

Planner Mode

Route

Scope Guard

No Spotify

Working Product Names

Running Music Mapper
Race Soundtrack Planner

Top Controls Area

Goal finish time and unit controls drive the race-mapped projection.

Display Units

All visible distance labels switch together.

Constant Pace

6:03 / km

Derived from goal finish time and marathon distance.

Coverage

Gap 35.0 km

Music ends before the planned finish.

Fixture Song Set

Single-Anchor Plan

Choose one Anchor Song, set a target in kilometres, and let the planner reorder around it.

Anchor Song

None selected

Achieved Start

Set an Anchor Song

Delta From Target

Set a target

Select one song in the timeline to turn this into a Single-Anchor Plan.

Local Saved Plan

Goal time, display units, fixture song set, timeline order, and anchor state restore on refresh in this browser.

Map Area

Song-coloured route segments stop honestly at the finish line.

42.2 km
Manually Curated Race Route

London Marathon Demo Race

The route remains the manually curated London Marathon Demo Race from Issue 2, while Fixture Songs now project forward using your planned finish time.

StartFinish

Playback Simulation

Scrub race time to preview the active song and route position.

00:00:00

Elapsed Time

00:00:00

Route Point

0.0 km

Active Song

Greenwich Glow

Mapped song playback is still on the route.

Race Telemetry Band

Elevation profile with hard-section overlays for late-race planning.

Curated labels reflect reviewed London route context, not official difficulty calls.

Algorithmic · Late-race fatigue build · 30.0 km to 36.0 kmCurated · Curated London focus stretch · 31.7 km to 34.4 kmAlgorithmic · Late-race fatigue close · 36.0 km to 42.2 kmCurated · Curated finish approach squeeze · 40.2 km to 41.8 km

Distance

42.2 km

Goal Finish

04:15:00

Route Status

Manually curated from public route references. Not labelled as official.

Source Notes

Official course overview

Used for the published course shape and landmark sequence from Greenwich and Woolwich through Cutty Sark, Tower Bridge, Canary Wharf, Victoria Embankment, Birdcage Walk, and The Mall.

Open source

Official 2026 event overview

Used for the start area, terrain, and race-distance framing: Greenwich/Blackheath, road, fast and flat, marathon distance.

Open source

Public GPX cross-check

Used to manually curate the geometry and elevation profile, then simplified and validated against marathon distance tolerance inside the repo.

Open source

Hard Section Notes

Algorithmic Hard Section

Late-race fatigue build · 30.0 km to 36.0 km

Algorithmic fatigue zone based on the closing third of a marathon plan.

Curated Hard Section

Curated London focus stretch · 31.7 km to 34.4 km

Curated London route context for the Canary Wharf section: extra turns and concentration changes, not an official difficulty designation.

Algorithmic Hard Section

Late-race fatigue close · 36.0 km to 42.2 km

Algorithmic fatigue zone for the final push where concentration and accumulated effort typically rise.

Curated Hard Section

Curated finish approach squeeze · 40.2 km to 41.8 km

Curated London route context for the Birdcage Walk approach: a late-race focus point near the finish, not a guaranteed hard point.

Song durations are preserved exactly. The planner does not trim or stretch tracks.

Timeline Area

Race-Mapped Songs show start and end timing against the route.

0 after-finish songs

Fixture Song 1

Greenwich Glow

Northbound Static · Controlled settle out of the start pens.

03:58

Time Range

00:00:00 to 00:03:58

Distance Range

0.0 km to 0.7 km

No hard-section overlap at this goal pace

Fixture Song 2

Docklands Drift

Meter Split · Cruise into rhythm before the course tightens.

04:11

Time Range

00:03:58 to 00:08:09

Distance Range

0.7 km to 1.3 km

No hard-section overlap at this goal pace

Fixture Song 3

Tower Bridge Breath

Late Lanes · A wider stride moment through the landmark surge.

04:23

Time Range

00:08:09 to 00:12:32

Distance Range

1.3 km to 2.1 km

No hard-section overlap at this goal pace

Fixture Song 4

Isle of Dogs Echo

Glass Harbour · Long-focus energy for the eastern bend.

04:49

Time Range

00:12:32 to 00:17:21

Distance Range

2.1 km to 2.9 km

No hard-section overlap at this goal pace

Fixture Song 5

Canary Pulse

Turnover Club · Punchy lift for a mentally sticky stretch.

05:01

Time Range

00:17:21 to 00:22:22

Distance Range

2.9 km to 3.7 km

No hard-section overlap at this goal pace

Fixture Song 6

Limehouse Lights

Apex Routine · Rebuild cadence after the crowds thin.

04:04

Time Range

00:22:22 to 00:26:26

Distance Range

3.7 km to 4.4 km

No hard-section overlap at this goal pace

Fixture Song 7

Embankment Engine

Negative Split · Rolling confidence back toward central London.

04:32

Time Range

00:26:26 to 00:30:58

Distance Range

4.4 km to 5.1 km

No hard-section overlap at this goal pace

Fixture Song 8

Westminster Wire

Signal Repeat · Firm tempo for the late-race squeeze.

04:16

Time Range

00:30:58 to 00:35:14

Distance Range

5.1 km to 5.8 km

No hard-section overlap at this goal pace

Fixture Song 9

Birdcage Burn

Final Bottle · Straight-line urgency into the final kilometres.

04:07

Time Range

00:35:14 to 00:39:21

Distance Range

5.8 km to 6.5 km

No hard-section overlap at this goal pace

Fixture Song 10

Mall Finish Drive

Tape Breakers · Fast closing texture for the finish approach.

03:54

Time Range

00:39:21 to 00:43:15

Distance Range

6.5 km to 7.2 km

No hard-section overlap at this goal pace

Playlist Coverage Gap

Music ends at 00:43:15 with 35.0 km of uncovered race remaining.