Boston Pace & Weather Optimizer

1. Target Runner Profile

Target Finish Time

: :

Runner Strategy

2. Environmental Factors

Air Temperature 55°F

30°F (Freezing) 45°F (Optimum) 70°F (Warm) 100°F (Scorching)

Relative Humidity 50%

Wind Vector

Direction

Speed 10 mph

3. Race-Day Forecast

Race Date

Start (local ET)

Sliders override the live forecast. Click Fetch to apply mile-by-mile Open-Meteo data along the route.

Boston topography note

Boston is a point-to-point course. The start in Hopkinton is 450 feet higher than the finish at Copley Square, but the four successive Newton hills (Miles 16–21) can destroy pacing if running too fast on early descents or during warm headwinds.

Pace Factor

100.0%

Optimal Pace Conditions

Adjusted Finish

3:15:00

+0:00

P10–P90: —

Sweat Rate / Fluid

22 oz/hr

400 mg Sodium/hr

Thermal Load Risk

LOW

Safe temperatures.

Gear Recommendations

Based on start-line conditions

Course Pacing & Elevation Analysis

Interactive Mile Chart

Mile-by-Mile Tactical Blueprint

Segment	Distance	Elevation Trend	Weather Pace Adjustment	Target Pace	Tactical Guide