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About jaycast

Weather-informed rideability forecasts for South Florida mountain bike trails.

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The trails

jaycast covers three South Florida MTB parks, each with a different surface and a different response to rain. Forecasts come from Open-Meteo (GFS or ECMWF) and nearby rain gauges when available. Scores are advisory only and are not official park status.

Camp Murphy MTB Trails

Jonathan Dickinson State Park, FL · sandy scrub

Coarse sugar sand under a light canopy. It rides loose and slow when bone-dry and firms up after rain.

  • Best: about 18 hours after meaningful rain, before the sun dries it back.
  • Worst: a long dry spell.
  • The trail never officially closes.
View Camp Murphy forecast

Markham Park MTB Trails

Weston, FL · dirt and gravel

Dirt and gravel trails that drain slowly. Riding wet dirt damages the surface. The county can also post official closures.

  • Base drain time: 8.5 hours after rain ends, plus 8 hours per additional inch.
  • Rain overnight usually clears by midday. Heavy afternoon rain can push reopening to the next day.
  • Short showers under 0.10 in are ignored.
  • A 30-day water-level rise of 1.25 ft or more adds an unsure warning. Drainage may be slow.
View Markham forecast

Quiet Waters Park MTB Trails

Deerfield Beach, FL · mixed hardpack

Firm terrain that stays fast even when dry. A thin layer of loose material sits over a hard base. After rain, expect puddles and slick roots.

  • The dry baseline score starts near the top.
  • Rain only temporarily degrades the surface. Mud clears within about 10 hours.
  • Weather comfort (temperature, wind) matters more here than surface.
View Quiet Waters forecast

How scoring works

Every day gets a star score from 1.0 to 5.0. The model blends surface conditions (pack quality or drainage timing), weather (temperature, wind, sky), and forecast confidence. Each trail is tuned differently: Camp Murphy is a sand-pack model, Markham is a drainage advisory with a nearby water-level signal, and Quiet Waters weights comfort weather more because its surface stays rideable.

The timeline shows yesterday through the next five days. Tap a day for a factor breakdown, and use the grid view to compare all three parks at once. Units are inches and degrees Fahrenheit.

Frequently asked questions

Is Markham Park rideable after rain?
Markham's dirt and gravel trails drain slowly. jaycast estimates a base of 8.5 hours after rain ends, plus 8 hours per additional inch, capped at 18.5 hours. A rapid rise in nearby water adds an unsure warning because it can slow drainage. Heavy afternoon rain can push reopening to the next midday.
When is Camp Murphy best to ride?
Camp Murphy's sugar sand rides best roughly 18 hours after meaningful rain, once the sand firms up and before the sun bakes it back to powder. A long dry spell leaves it loose and slow.
How does jaycast score the trails?
Each trail gets a 1.0 to 5.0 star score from a weather-informed model: surface pack or drainage timing, ride-window rain, temperature, RideFeelsLike, wind, sky, and forecast confidence. Markham also uses a nearby USGS water-level reading. Scores are advisory, not official park status.
What is RideFeelsLike?
RideFeelsLike is how warm a ride feels on the bike: the Australian Bureau of Meteorology apparent temperature, which combines humidity and wind, plus the airflow you generate while riding, with the wind treated as a crossing wind. It reads cooler than the heat index, which ignores wind entirely. The card shows it short, as "ride feels". Morning covers the 8 AM to noon ride window and afternoon covers noon to 4 PM; the card edges and comfort cues use it in both windows.
Do I still need to check official park status?
Yes. jaycast forecasts conditions but is not an official trail status service. Parks can close for reasons weather models cannot see, so check local reports and official notices before heading out.