Run100s ("Run Hundreds") - A Not-For-Profit UltraRunning Corporation

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Schedule of the (approx.) 202 North American 100-milers: (Map of the start lines)
Anchor Down // Ancient Oaks // Angeles Crest // Antelope Canyon // Antelope Island Buffalo Run // Arkansas // Arrowhead // The Badger // Badger Mt. // Baldy // The Bear // Beast of Burden(Summer) // Beast of Burden(Winter) // Best of San Diego // Beyond Limits // Bighorn // Black Hills // Blackbeard's Revenge // Blood Rock // Booneville // Born to Run // Brazos Bend // Bromont Ultra // Bryce Canyon // Burning River // C&O Canal // Cactus Rose // Canal Corridor // Cascade Crest // CGG // Charleston // Chattanooga // Children of the Cane // Chimera // Cirque du Griffith Park // Cloudsplitter // Coldwater Rumble // Cool Moon // Creede // Cruel Jewel // Cry Me A River! // Dark Divide // Daytona // Deadman Peaks // Desert Solstice // Destin Beach // Devil Dog // Dinosaur Valley // Double Top // The Drift // The Dunes // Eagle Up // Eastern States // Falls // Farmdale Trail // Fiesta Grande Day // Flat Top Mesa // Forbidden Forest // Foxtail // Frozen: H3 // Gaspesia // Georgia Jewel // Ghost Train // Grandmaster // Great Cranberry // Greenbrier // Grindstone // Habanero Hundred // Hainesport Hundred // Haliburton // Halloween Hobble // Hardrock // Hawk Hundred // Headlands // Heartland // Hell Hole Hundred // Hellbender // Hennepin Hundred // HighFive // High Lonesome // Hitchcock // Honey Badger // HURT // IMTUF // Indiana Trail // Iron Horse(FL) // Iron Horse Ultra(CAN) // Jackpot // Jalapeno Hundred // Javelina Jundred // Kettle Moraine // KEYS100 // Knock on Wood // Kodiak // Lake Martin // Lake Murray // Lake Tahoe // Leadville // Lean Horse // Lhotse // Lighthouse // Loco Go Big or Go Home // Lone Star // Long Haul // Lost Soul // Lou Garou // LOViT // Maah Daah Hey // Mace's Hideout // Marji Gesick // Massanutten // Miami // Midstate Massive // Midwest Everest // Mines of Spain // Mogollon Monster // Mohican // Moose // Mountain Lakes // MST // Nanny Goat // New Jersey // NJ Devil // No Business // Oil Creek // Old Cascadia // Old Dominion // Old Pueblo // Orcas Island // Oregon Cascades // Ouray // Outlaw // Ozark // Ozark Foothills // Peak // Pigtails Challenge // Pine to Palm // Pine Creek // Pinhoti // The Pistol Ultra // Plain // Pony Express // Potawatomi // Prairie Spirit // Pulse // Pumpkin Holler // Rails-to-Trails // Red Dirt // Resurrection Pass // Rim to River // Rio del Lago // River Valley Revenge // Riverlands // Rocky Raccoon // Run-de-Vous // Run Rabbit Run // Run Woodstock // Saddle2Surf // Saint Sebastian // Salt Flats // San Diego // Sangre de Cristo // Scout Mountain // Screaming Monkey // Shawnee Hills // Silver Moon // Silverheels // Sinister 7 // Skydive // Southwest // Stagecoach // Stokely Creek // Strawberry Fields Forever // Sulphur Springs // Superior // Susitna // Tahoe Rim Trail // tBunk // Teanaway Country // Tesla Hertz // TGNY // Tunnel Hill // Tuscazoar // Umstead // Urban Adventure // Ute // Uwharrie // Vermont // Viaduct Trail // Virgil Crest // War Hammer // Wasatch Front // Washington Yeti // Wawayanda Wonderful // Western States // Whistler Alpine Meadows // White Mountains // Wildcat // Wyoming Range // Yeti // Yukon Arctic // Zion // Zumbro
Google spreadsheet of 100⁺ milers
Calendars/schedules
No. Calif. ultras (< 100 miles) // So. Calif. ultras // Northwest ultras // Florida ultras // Idaho ultras // UK Ultras // Other ultras (over 1,100 events, 28.4 to 3100 miles)
Reports (over 500, since '95)
Ultra Slams & Series
The Grand Slam of Ultrarunning™ // Midwest Grand Slam of Ultrarunning // Washington Grand Slam // The Last Great Race // The Great Eight // Western Slam // Eastern Slam // LarrySlam // Rail Trail Slam // Rocky Mt. Slam // Californa Slam // Kansas Grand Slam // San Diego Ultra Slam // All Amer. Mtn. Slam // Super Slam // HRQ Super Slam // Grand Kona Slam // Alaska Slam // Arctic Slam // Extreme Triple Crown // Grand Slam of the World // Swedish 100 Miles Challenge // 5 Continents Grand Slam // O.U.S. Slam // Pinhoti Slam // Triple Crown of 200s // Bartley Double // NorCal 100K Grand Slam // The Beast Series // Tejas Trails 300 // Tejas Hell // Gnarly Bandit // Montrail Ultra Cup // TrailRunner Trophy Series // NoCal Ultra Grand Prix // SoCal Ultra Grand Prix // Oregon Trail Ultras // Canadian Ultras // Western New York Ultras // UMTR Ultra Series
Clubs
BAUR // Buffalo Chips // Club Fat Ass // Coastside Running Club // Dallas Dirt Runners (D.D.R.) // Flatlander Ultrarunners // Florida Ultra Runners(FUR) // Folsom Trail Runners // GAC (Gil's Athletic Club) // GOATz (Greater Omaha Area Trailrunnerz) // GUTS (Georgia Ultrarunning & Trailrunning Society) // HURT // iRunFar's list // Louisiana Ultra Runners // Pacific Striders // Palo Alto Run Club // Quicksilver Running Club // Reno Running & Fitness // SC Striders // SLUGs (St. Louis Ultrarunners Group) // SURF // Tamalpa // TATUR // Trail Animals Running Club(TARC) // Trail Running Adventures // Tullamore Dew Running Club // Ultraladies // UltraRunning Matters // VHTRC
Web sites/pages that I manage/host/etc. (11,975+ pages)
The Grand Slam of Ultrarunning™ // Ruth Anderson Ultras
Photos, including albums for:
Angeles Crest // Avalon 50m // The Bear // Cascade Crest // Catalina 100k // Coyote 4 Play // Devil's Backbone // Hardrock // H.U.R.T. // Javelina Jundred // Leadville // Lean Horse // Massanutten Mtn. // Old Dominion // Quad Dipsea // Rio del Lago // Rocky Raccoon // Umstead // Vermont // Wasatch Front // Western States // Zane Grey
Bios of 2340+ ultrarunners (not maintained); some Photos
Miscellaneous
Books // Videos // Foreign ultras (in German) // Free advice // Running-related quotes // Difficulty ranking of ultras // Milestones (mega-ultrarunners in the USA) // (other mega-ultrarunners) // Ultrarunner packing
Other Internet Resources
Subscribing to the ULTRA List // Joining the Yahoo! group // Goodies (buckles, T-shirts, etc.) // What's an Ultra Marathon? (and how can I finish one?)

Blogs, Forums & Podcasts
iRunFar.com Trail/Ultra Resource (my interview)
Trail Runner Nation podcasts & other resources (my interview)
URP: UltraRunner Podcast collection of podcasts, etc. (my interview)
The Ultra Wire Your UltraRunning Community
Talk Ultra All about running. By runners, for runners.
A Trail Runner's Blog (by Scott Dunlap)
Running, my second job and passion... (by Jean Pommier)
Ten Junk Miles A lighthearted conversation by trail, road, and ultra runners
DFL Ultrarunning (by Mike & Eric)
"Going the Distance!" Blog (by Carey Smith)
H.U.R.T.'s Blog (Hawaiian ultras)
Science of Ultra (by Shawn Bearden)
Merrell's Epic Trails (get outside!)
Elevation Trail (by Tim Long)
EnduranceBuzz Trail/Ultra Resource in the South/Midwest US
Dirty Inspirations (by Terri Schneider)
130 Running Blogs! (by Andreas)
MightyGoods interviews with ultrarunners
Pain Cave (by Jay Friedman)
Wasatch Speed Goat (by Scott Mason)
Multiday Running Blog
Badwater Blog
Mister Tristan (by Gary Bruner)
Run 100 Miles (by Christian Griffith)
Ultrafinishers (by Scott Johnson)
Undefeated Running (by Adam Gothelf)
Your First Ultra (by David Tosch)
100 mile podcast on-going audio series
Dr. Mel Newton ultra- running/riding vet
Podcast Directory from the ATRA
Sites/blogs by other ultrarunners
Coaching & Camps
Andy & Kim Holak's trail running adventures
Ann Trason's Coaching for Endurance Running
Bad to the Bone: trail runs & training/coaching
Bree Lambert's site: Live Well; Finish Strong
Chad Ricklef's site: Ultramarathon Coaching
Cindy Stonesmith's site: UltraRunner Training
Danny Dreyer's site ChiRunning coach
Tom & Donnie's site Flahavan Ultra Coaching
Jimmy Dean Freeman's site coaching & trail runs
Karl Meltzer's coaching & ultra blog
Lisa Smith-Batchen's site coaching, events & running camps
Michael Garrison's coaching site (on Oahu)
Nancy Shura-Dervin's UltraLadies Coaching
OptimizeItCoaching: for people with special requirements, injuries or interesting goals
Paul DeWitt's site: Train Smarter, Not Harder©
Scott Jurek's site training & trail running
Scott Weber's site ultramarathon coaching
Sharman Ultra Ian Sharman and Ellie Greenwood
Stephanie Howe's Coaching for Endurance
Susan Donnelly's Don't Go Home Without a Buckle
Terri Schneider coaching, clinics & sport psychology
Tim Long's site: Footfeathers Coaching & Run Clinics
Tim Neckar's site personal running coach
Tommy Nielsen Coaching personal on-line coach
Tracy Garneau's coaching: Garneau Endurance
Yassine Diboun's coaching & training: Animal Athletics
360° Moab TrailRunning Adventures running vacations
Other Links
Kevin Sayers' Site The How-To of Ultrarunning
UltraRunning Magazine News, Races, etc.
RealEndurance: Gary Wang's site - search race results
UltraSignUp Race registration and stats
UltraLive Race tracking and stats
UltraSplits Splits, pacing & lottery odds
Zombie Runner ultra gear & supplies
San Francisco Running Company THE Marin Connection
Healdsburg Running Company Lake Sonoma and so much more
Victory Sportdesign ultra dropbags
Sage to Summit: fastpacking site
Ultra Sports Science Foundation: ultra-endurance science & medicine
Epic Ultras great ultras in Kansas
High Desert Drop Bags from ultra-veteran Jan Gnass
Joe TrailMan gaiters
Michigan Bluff Photography
UltraFanatics: track your ultra results
DUV: ultramarathon statistics
ULTRA Magazine UK's new magazine
Trail Runner Magazine the gospel of trail running
ULTRAmarathonRunning Trail, mountain, desert events, etc.
Ultrarunning: just what is an ultra?
USA Ultrarunning 100k & 24hr teams
International Trail Running Assn. trail running org.
International 100+ UltraRunning Foundation connecting ultrarunners
International ultras calendar / Multi-day ultras
Arkansas Ultra Running Assn (AURA) AT100+
AUA news and info on USA ultrarunning
Kansas City trail running
Planet Ultramarathon news on ultrarunning
SUCCEED! products (electrolytes, etc.)
Robert Tavernini's awards for ultras
Team CRUD: Pikes Peak, etc.
USA Crossers: run across America?

"http://www.Run100s.com/" (updated: 6/29/21) StanJ@Run100s.com (over a gazillion hits since 5/15/95)