About
What is RUNCLAX?
RUNCLAX is a runner results platform for Sacramento-area races. It brings results, rankings, and runner profiles together into a single searchable index so you can see how you stack up across every race we cover.
The Runner Index
CLAX stands for Competitive Local Athlete indeX — the heart of RUNCLAX. Every runner with at least three recent results earns a score: the average of their three best age-graded performances over the trailing three years. That single number places you into one of five tiers — from Participant to World Class — so you can compare yourself against any other runner in the community regardless of age, gender, or preferred distance.
Runner profiles show your Runner Index badge, personal bests, an age-graded trend, predicted race times based on your index, podium and win stats, a year-by-year summary, and your full race history.
How to use the app
Rankings
The Home page leads with the Runner Index leaderboard, plus Performance (fastest times or age-graded), Podiums, Badges, Most Improved, Most Active, and Clubs. Filter by distance, year, gender, location, or search. Click a runner to open their profile, or hit “Compare” to stack two runners side by side.
Races
Browse the Sacramento-area race calendar, filter by status and year, and click any race to expand its full results. Click a runner in the results table to view their profile.
Clubs
Browse local clubs and their rankings. Once you claim your profile you can join an existing club or create your own.
Claim your profile
From the Dashboard, search for yourself, open your profile, and hit “Claim this profile”. Claiming unlocks club joining and result management.
Coverage note
We don't have every race in the database yet. RUNCLAX currently covers a growing set of Sacramento-area races — if a race isn't here, it likely hasn't been ingested yet, not that no results exist. Check back as we continue adding events.
Keep runclax free
Runclax is a free, ad-free community project. If you'd like to help cover server and data costs, you can support the site.
Age grading methodology
Every result on RUNCLAX is age-graded using the USATF Masters Long Distance Running (MLDR) 2025 road age-grading tables (maintained by Alan Jones). These single-year factors cover ages 5–99 for the 5K, 10K, Half Marathon, and Marathon for men and women, and are packaged with the backend as services/mldr_2025_factors.csv.
Each result's percentage is computed from the WMA road open standards for 5 K / 10 K / Half / Marathon × M/F:
Because open standards are world-class times, the percentage can exceed 100 for elite runners on good days. Our Sacramento-area data averages around 47% and ranges from 6.4% to 99.5%. Factors are applied at ingest time — every result row stores its own age_graded_percentage, so leaderboards, profiles, and the Runner Index simply read stored values.