Survivor Wiki
Survivor Wiki

EOC (also known as Austin's Elemental Obstacle Course) is a recurring physical challenge that debuted in Survivor: San Juan del Sur.

The challenge was created by a 13-year-old boy named Austin Russell, who was part of the Make-A-Wish Foundation and whose wish was to create a challenge for Survivor.


Castaways must race through a series of obstacles based on the four elements while tethered together to complete a final objective. The first tribe or team to complete that objective wins.


The challenge debuted as the final six Reward Challenge in San Juan del Sur. Called the "Elemental Obstacle Course", the course opened with an "Earth" section where each team had to race through a haystack tethered together, followed by hitching posts that castaways must alternate going over and under. The "Air" and "Water" section of the course requires castaways to carry a bucket of water over a giant, netted teeter-totter to dump into another, larger bucket. Once that bucket is full, a gate would drop along with a bag of puzzles pieces. The "Fire" section required the team to assemble a plank puzzle depicting flames and the phrase "Blood vs. Water" to win the challenge. Although the team of Jon Misch, Keith Nale, and Missy Payne was slowed down by Missy injuring her ankle on the teeter-totter, they managed to finish their puzzle first in a close race to win reward.

In Game Changers, the challenge was used as a combined Reward/Immunity Challenge. Three members of each tribe would have to go through the course. The "Earth" section now required castaways to navigate through a structure of intertwined sticks. Upon reaching the puzzle, a fourth member would untie the puzzle pieces, which the last two must use to solve the puzzle featuring flames and the season's logo. In a tight race between the three tribes, Nuku finished first, while Tavua solved their puzzle seconds before Mana, winning both tribes immunity and sending Mana to Tribal Council. Notably, Troyzan Robertson found Tavua's Hidden Immunity Idol at the back of their puzzle table.

In Survivor 43, the challenge was used as a combined Reward/Immunity Challenge. Four members of each tribe would have to go through the course. Upon reaching the end, one member would roll balls up a ramp, until all three rest on the small ledge at the same time (replacing the "Fire" puzzle.) Vesi finished first and won immunity after retaining a lead for the whole challenge, and while Baka was slower and fell behind, they caught up to Coco in a tight race for second place. Baka landed all three balls on the ledge after Ryan Medrano intentionally knocked Coco's off to throw the challenge, winning immunity and sending Coco to Tribal Council.

In Survivor 44, the challenge was used as the final tribal Immunity Challenge. Though Tika broke off to an early lead, the tribes were even heading into the final task, where two members had to land three balls in slots at the finish of a table maze. Ratu and Soka quickly pulled ahead to clinch a first- and second-place respectively, sending Tika back to Tribal Council.


Episode Challenge Type Winners
San Juan del Sur
"Let's Make a Move"
Team Reward S29 jon tS29 keith tS29 missy t
Jon, Keith, Missy
Game Changers
"Survivor Jackpot"
Tribal Reward/Immunity S34 aubry tS34 jt tS34 jeff t
S34 malcolm tS34 michaela tS34 sandra t
S34 andrea tS34 cirie tS34 ozzy t
S34 sarah tS34 troyzan tS34 zeke t
Survivor 43
"Stop with All the Niceness"
Tribal Reward/Immunity S43 cody tS43 dwight tS43 jesse tS43 noelle t
S43 elie tS43 gabler t
S43 jeanine tS43 owen tS43 sami t
Survivor 44
"The Third Turd"
Tribal Reward/Immunity S44 brandon tS44 carson t
S44 kane tS44 lauren tS44 matthew t
S44 danny tS44 frannie t
S44 heidi tS44 jaime tS44 matt t



  • This challenge's designer, Austin Russell, later became a member of the Survivor Dream Team.[1]
  • San Juan del Sur is the only season to use this challenge post-merge.


Recurring Challenges
A Bit Dinghy · A Bit Tipsy · A Crate Idea · A Leg Up · A Numbers Game · Air Raid · Angry Chair · Around the Bend · Back in Slack · Balancing Point · Ballin' A Jack · Barrel Bridge · Barrel of Monkeys · Basket Brawl · Better Homes and Island Living · Beyond the Wheel · Blind Leading the Blind · Blue Lagoon Bustle · Blue Plate Special · Boats, Brains & Brawn · Bone to Pick · Boulder Smash · Bow Diddley · Box Your Mind · Braille Maze · Broken China · Buggin' Out · Build It Up, Break It Down · Butch Cassidy · By Any Means Necessary · By the Numbers · Cage Against the Machine · Can't Buoy Me Love · Cannonball Run · Caught in the Web · Cell Block Sea · Challenge Pitch · Chief's Choice · Chimney Sweep · Chinese Zodiac Symbols · Choose Your Weapon · Coconut Juice · Crate Escape · Crocodile Rock · Crosswalk · Cube Crisis · Dear Liza · Dive Masters · Dizzy Gillespie · Dizzy Miss Lizzy · Domino Effect · Draggin' the Dragon · Dragging the River · Drop A Log · Drum Roll · Dulcimer Stomp · End of the Line · EOC · Eve 6 · Fallen Comrades · Fast Fire · Faulty Towers · Fauxconut Bowling · Fire and Water · Fire Fighter · Fire Starter · Flips, Flops, & Flags · Float Your Boat · Floating Puzzle · Game of Bridge · Gatecrasher · Get a Grip · Get Barreled · Get Hooked · Get Your Goat · Gimme Three Steps · Great Escape Run · Hands on a Hard Idol · Hear About It Ladder · Hot Pursuit · House of Cards · House of the Holey · Idol Hands · Jail Break · Jump Shot · Jungle Relay · Kamikaze · Keel Hauling · Keep It Up · Keep on Your Toes · Kenny Log-Ins · Kicking and Screaming · Kitty Litter · Know Your Loved One · Ladder Tree Golf · Last Gasp · Letter Hunt · Lock, Load and Light · Lock Step · Log Jam · Losing Face · Mask Match · Matchmaker · Matt Finish · Mayan Pizza · Memory · Mud Pack · Mud Slide · Muddy Waters · New School · New Tribe Member · Nut Bucket · O-Black Water · Odd Shaped Bottoms · Operation Balance Build · Out on a Limb · Over-Extended · Paddle Battle · Paddle Out · Perch · Pilfering Pirates · Piranha Feast · Pole Dancing · Pot Head · Push Me, Pull You · Puzzle Dig · Q and A · Quest for Fire · Race to Shore · Ram-Ball On · Rescue Mission · Rice Race · Rise and Shrine · Rock Bottom · Rock n' Roll · Rock the Boat · Rod Screw-It · Roll With It · Roller Ball · Rung O Star · Running Down a Dream · Sacrificial Lamb · Schmergen Brawl · Sea Crates · Sea Legs · Sea Salvage · Shipwrecked · Shoot 'n' Shuffle · Shooting Gallery · Shoulder the Load · Simmotion · Slip, Slide & Score · Slither Me Timbers · Smash and Grab · Snag, Drag and Bag · Snake in the Grass · Snake Island Relay · SOS Signal · Spear-it Hunt · Spit It Out · Splash Back · Sprung a Leak · Squared Off · Squatty Probst · Stacked Up · Stairway to Heaven · Stairway to the Stars · Star Man · Station By Station · Step on Up · Stomp-ede · Strung Out · Sumo at Sea · Super Ramp · Survivor Auction · Survivor History · Survivor Pentathlon · Survivor Quiz Show · Swahili Scramble · Swing Break · Tangled Up · Temple Transfer · The Ball Drop · The Cruel Sea · The Game is Afoot · The Gauntlet · The Home Stretch · The Maze · The Obstacle Course · This Much · Thrash, Splash & Bash · TLP O-Course · Tomb Raider · Total Recall · Troubled Water · Uncomfortably Numb · United We Stand · Vampire Bats · Vertically Challenged · Vertigo · Wall to Wall · Well Stacked · What-er Drag · When It Rains, It Pours · Wicker Flicker · Will It Go Round · Witch Hunt · Wrist Assured · Yank Your Hank · You Shook Me