Endless Summer in the LBC Half Marathon
Race Day Weather
Warm start, high humidity
Starting at 66°F, heat will be a factor from the gun — go out conservative and stay on top of hydration. Light winds shouldn't be a major factor for pacing. High humidity (81%) will make it harder to cool down through sweat — increase fluid intake accordingly.
Pace Calculator
Get forecast alerts for Endless Summer in the LBC Half Marathon
We'll text or email you when the forecast shifts — so you can adjust gear, pacing, and strategy. Max one per day.
Get your personalized Endless Summer in the LBC Half Marathon race plan
True Effort pacing, weather-adjusted mile splits, fueling timeline with aid stations, packing checklist, carb tracker, spectator guide — all personalized to your goal and race-day conditions.
Race Info
Endless Summer in the LBC is an annual 5K, 10K, and half marathon held each July along the Long Beach waterfront. The half marathon runs a flat, out-and-back route on the beach path with ocean views for the full distance. CaliFlow Runs launched the event in July 2025, and the 2027 edition marks its third running.