Join the beta listJoin->Offline-first race plans
Race-day planning that still works when the signal disappears.
Built from your GPX and planned training-data support, Bwlch turns your race spreadsheet into personalised splits, fueling targets, and crew instructions your support team can use offline.
Eryri 100K preview
Rhyd-Ddu
Expected arrival
18:40-19:15
Prepare
soft flasks, waterproof shell, rice balls, headtorch
Runner note
swap gloves if wet
Parking
village car park, 6 min walk
Next crew point
Llanberis / 38 min drive
Before race day
The spreadsheet, rebuilt around how you move.
Bwlch looks at how you actually move on climbs, descents, and runnable ground, then turns the course GPX into arrival windows instead of fixed guesses.
Alpine 100K preview
101 km / 6,100 m
Finish window
18:10-20:05
Confidence
Medium
Fuel target
82g/h
Crew points
3
| Aid station | Distance | Arrival window | Fueling | Access |
|---|---|---|---|---|
| Bertone | 21.4 km | 09:45-10:20 | 75g carbs / 550ml | Crew |
| La Fouly | 42.8 km | 13:35-14:25 | 88g carbs / 650ml | Drop bag |
| Champex-Lac | 56.9 km | 16:10-17:05 | rice, broth, soft flask | Crew |
| Trient | 72.6 km | 20:10-21:25 | 90g carbs / 500ml | Crew |
| Vallorcine | 83.8 km | 23:20-00:40 | caffeine, warm layer | Drop bag |
| Finish | 101.2 km | 02:10-04:05 | steady intake | Meet point |
On race day
Clarity for the person waiting in the dark.
Be at the aid station in time. Know where to park. Know what to have ready. Know where to go next.
01
Saved before signal drops
Crew instructions and planned arrival windows are designed to be available without a live connection.
02
Plain English handoffs
What to prepare, where to park, and what the runner said they will probably need.
03
Arrival windows, not false precision
The plan shows uncertainty clearly, so the crew can make practical choices.
04
Next movement is visible
Each stop points the crew toward the next reachable aid station and drive time.
Built for serious planners
Operational, not motivational.
Operational scope
Race range
50K to 100M
Planning surfaces
Sheets, docs, notes
Signal requirement
Works offline
Process the crew can follow
01 Intake
Import route profile and race constraints.
02 Model
Set climb pace, descent control, and fueling rules.
03 Validate
Stress arrival windows against real terrain splits.
04 Dispatch
Publish a crew-ready version before coverage drops.
Race-day action panel
What needs to be ready before leaving each stop
Bwlch started from the kind of spreadsheet where every climb, aid station, bottle refill, and crew handoff has a time beside it.
Confirm parking location and walk time before departure.
Pre-pack station-specific items in handoff order.
Review runner notes and likely gear swap conditions.
Lock the next reachable crew point and drive duration.
Later: qualifier tracking, season planning, and deeper race integrations.
Beta waitlist
Bring a real race plan.
Is Bwlch live yet?
Bwlch is not live yet. The beta is being built now.
Will the crew view work without signal?
Race-day views are being designed offline-first, so crew instructions and planned arrival windows can be saved before signal drops.
Will I need Garmin or Strava?
Garmin and Strava support is planned. GPX course planning is the foundation.