Objective: To assess the prevalence of high blood pressure (BP) and cardiovascular risk factors among marathon runners during Beirut-Marathon 2014. Methods: A total of 325 marathon runners were divided into 42 km and 10 km groups. They were assessed for cardiovascular risk factors by measuring their BP and answering a questionnaire. The questionnaire composed of 22 questions related to demographic information, risk factors, medical history, family history, medical checkups, use of antihypertensive drugs and definition of hyponatremia. Results: There were 30 runners in the 42 km group and 295 in the 10 km group interviewed. The majority of 42 km runners were males 29 (96.7%) vs. 205 (69.5%) in the 10 km group, (P = 0.001). The 42 km group was older than 10 km group (47 ± 13.8 years vs. 38.5 ± 14.6 years; P = 0.0025). The prevalence of hypertension was 46.7% in the 42 km group as compared to 31.2% in the 10 km group (P = 0.08). Systolic BP (SBP) was higher in 42 km group vs. 10 km group (143 ± 22.4 mm Hg vs. 129.9 ± 17.8 mm Hg; P = 0.0004). The heart rate was lower among 42 km vs. 10 km group (71 ± 11.1 bpm vs. 84 ± 16 bpm; P < 0.0001). Only 10% of the runners in both groups reported that they have hypertension (HTN). Conclusion: There is a high prevalence of HTN among marathon runners but minorities were aware that they have hypertension. The 42 km runners tend to be older with higher systolic blood pressure as compared to the 10 km runners.