Running’s audience is getting larger and less narrowly defined. The Outdoor Industry Association’s 2026 executive summary reports that 52.3 million Americans ran on the road in 2025—more than one million above the prior year—while trail participation reached 17.2 million.
Trail running recorded the sharper rate of change: up 6.6% in the latest year and 57% since 2019. That does not mean every new participant is becoming a high-mileage specialist. The same report says casual running grew by roughly 7% while core participation slipped 1.1%.
The commercial signal
The expanding audience is a multi-sport audience. Participants cross over with walking, hiking, gym workouts, treadmill use and yoga. For ShreddedAF, that makes endurance a stronger commercial and editorial pillar than treating running as a niche race-results desk.
What the numbers do not prove
These are U.S. participation estimates, not global totals, and participation does not equal spend. The data supports a large reachable audience; it does not tell us that every runner will buy premium shoes, technology or supplements.