Trail running

people 30 39 years 30s 35 39 years 35 40 years active activity adult aliso viejo athlete athletes athletics caucasian caucasian ancestry caucasian ethnicity caucasians clear sky commitment determination discipline empty sky endurance exercise field fitness flare friendship full length grass grass field grassland health healthy healthy activity jogger jogging lens flare male mid adult mid adult mid adult man motivated motivation nature one person outdoor outdoors path pathway perseverance persistence physical fitness runner running self control springtime sunlight teamwork thirties trail trail running training vertical willpower