ดิ อะเมซซิง เรซ 8 (อังกฤษ: The Amazing Race 8) เป็นฤดูกาลที่ 8 ของรายการยอดนิยม ดิ อะเมซิ่ง เรซ โดยจะมีความแตกต่างจากดิ อะเมซิง เรซ ในฤดูกาลที่ผ่าน ๆ มา จากเดิมแต่ละทีมมีเพียงผู้ใหญ่แข่งเป็นคู่ แต่ในฤดูกาลนี้การแข่งขันจะเป็นแบบครอบครัวที่มี 4 คน และอนุญาตให้มีบุคคลที่ยังไม่บรรลุนิติภาวะอีกด้วย (ต่ำกว่า 8 ปี) เป็นฉบับครอบครัวโดยใช้ชื่อในการแข่งขันว่า The Amazing Race : Family Edition อย่างไรก็ตาม การแข่งขันจะกลับมามีผู้เข้าแข่งขันเพียงทีมละสองคนในดิ อะเมซิ่ง เรซ 9
ฤดูกาลนี้มีกำหนดออกอากาศตอนแรก 2 ชั่วโมงเต็ม ในวันที่ 27 กันยายน พ.ศ. 2548 ทางซีบีเอส และจะออกอากาศตอนแรกในประเทศไทย เวลา 20:00 น. ของวันที่ 28 กันยายน พ.ศ. 2548 ทางช่อง AXN ยูบีซีช่อง 19 ส่วนตอนสุดท้าย จะออกอากาศในวันที่ 13 ธันวาคม พ.ศ. 2548
ตารางแสดงชื่อ ความสัมพันธ์ของผู้แข่งขันในขณะถ่ายทำของแต่ละทีมพร้อมทั้งแสดงสถานะในการแข่งขัน ดังนี้ เรียงตามลำดับผู้เข้าเส้นชัยก่อน (ตารางนี้อาจไม่ได้แสดงข้อมูลที่ตรงกับข้อมูลที่ออกอากาศในโทรทัศน์เนื่องจากข้อมูลที่เพิ่มเข้ามาบางส่วน หรือข้อมูลที่ถูกนำออกไปบางส่วน)
หมายเหตุ 1: ในเลกที่ 10 เป็นเลกแบบ Double Length (มีอุปสรรค 2 งานและทางแยก 2 งาน) และแบ่งการออกอากาศออกเป็น 2 ตอนหมายเหตุ 2: ในเลกที่ 11 เป็นเลกแบบ Double Length (มีอุปสรรค 2 งานและทางแยก 2 งาน) ออกอากาศเป็นตอนเดียวยาว 2 ชั่วโมงติดกัน
ในบางเลก ทางรายการจะมีรางวัลพิเศษให้กับทีมที่มาถึงจุดพักเป็นทีมแรก สำหรับรางวัลที่เป็นแพ็กเกจทัวร์ทั้งหมดสนับสนุนโดยแทรเวลโลซิตี้
The first Detour of the race was Build it or Buggy It. In Build It, teams needed to use the materials provided to build a miniature, working watermill. Buggy It required teams to transport a traditional Amish buggy along a 1.5-mile course with two members riding in it.
The Roadblock required a racer to whisper a code phrase ("The sky is blue") to spies walking in the area around the Tidal Basin. Of the fifty spies, ten would reply with another phrase ("The sea is green"). Once the racer had found one of the ten spies, they would receive their next clue. The Detour choices, Heat of the Battle and Heat of the Night, were both part of a full scale American Civil War reenactment. In Heat of the Battle, teams had to transport five injured people to a tent. Heat of the Night told racers to take a keg of kerosene to a table. Once there, they had to fill 20 lanterns with the kerosene and light them. After completing the Detour, the teams had to grab a Civil War flag and take it to the nearby pit stop.
The Detour choices for this leg were Forrest Gump or Muddy Waters. In Forrest Gump, teams had to travel to Wando Shrimp Co. to de-head 200 pounds of shrimp. In Muddy Waters, teams had gone to Ridgeville Mud Run to drive through a 3X4 SUV obstacle course which was filled with mud. In the course, if they got stuck, they would have to wait to be towed out. Once towed out, they would have to restart the course. In the Roadblock, two racers from each team rode a centrifuge at 3.2 แรง g.
In the Roadblock, teams had to climb to the top of the Worlds Largest Office Chair. It is a similar to unaired Roadblock in leg 10 of season three. The Detour was Work or Play. In Work, Teams used a two-person handsaw to cut four slices off a log 12 inches in diameter. In Play, Teams made their way to a riverboat where they played 21 against a professional dealer. To win a round, the hand of each team member needed to total more than the dealer’s hand, or the dealer must bust (the dealer's hand goes over 21). Once the Teams won three rounds, they would earn their clue.
In the Race's only aired Fast Forward, team members had to jump in tandem off a 140 foot drop, when all members completed the drop, they would win the Fast Forward. The Detour was Rhythm or Coos. Rhythm required teams to deliver four musical instruments to a local club. The musical instruments are saxophone (in Teatro Nacional de Panama), trumpet (in Escuela Simon Bolivar), conga drum (in Casa G?ngora?) and trombone (Instituto Nacional de Cultura). Coos required racers to use binoculars and search within the rainforest canopy for wooden replicas of five local bird species. They have to circle the correct bird species on the provided bird identification card. When all five were circled, they present the card to the ranger who would confirm their choices. The Roadblock for this leg of the race required one team member to hit one baseball pitched by a local little leaguer.
In the Roadblock, one person from each team searched for a red bean among 800 pounds of coffee beans. The Detour was Relic or Ripe. In Relic, teams had to recover four Mayan relics in Rainmaker . In Ripe, teams had to harvest 15 bushels of bananas in Frutas Selectas del Tropico.
The Detour on this leg was Brush or Barrel. In Brush, teams had to go to Taller Eloy Alfaro in Sarch? and painted two cartwheels with the same design as the sample they were given. In Barrel, teams loaded sugarcane in Ingenio La Argentina and transported sugarcane 6 miles to a warehouse of Fabrica Nacional de Licores, where they would find a hidden clue among dozens of rum barrels. The Roadblock had one person from each team compete in a 50 lap Superkart race.
In the Roadblock, one team member had to perform a 360 degree loop in an airplane. The Detour choices in Horseshoe Bend, Arizona were Bearing or Bailing. In Bearing, teams had to locate three locations on three different islands, using a compass bearing. In Bailing, teams had to bail water from a submerged boat and carry it onshore.
The Detour on this leg of the race was Drop Down or Ride Down. In Drop Down, teams completed a two-stage rappel 270-feet down into Bull Canyon. In Ride Down, Teams selected bikes and rode a six-mile course down into Bull Canyon. The Roadblock had team members ski jump into the olympic pool.
On the first half of the leg, the Detour was Spike It or Steam It. In Spike It, teams used old-time materials and tools to complete a 20-foot section of railway track. In Steam It, teams used buckets to fill the tender of an old-time steam locomotive with 400 pounds of coal. The first Roadblock of the leg featured two team members riding horses to corral six cattle from a holding pen.
On the second half of the leg, the Detour was Pioneer Spirit or Native Tradition. Pioneer Spirit had teams attach wheels to a covered wagon, hook up a team of horses, and drive along a quarter mile course. Native Tradition had racers build a teepee with traditional tools. The second roadblock of the leg featured two team members riding a golf cart while searching for colored balls on the back nine of a golf course. They searched for balls that matched the color of the flag of the cart they picked.
The Detour of second half of the leg was Ship or Shoe. In Ship, teams sailed across Toronto Harbour through Queen's Quay and one racer climbed the 100-foot mast of the Kajama to retrieve a nautical flag. In Shoe, teams searched through 100 pairs of shoes that were on people walking around to match the pair they had chosen. The final Roadblock of the Race required one person to complete a giant jigsaw puzzle of North America. Once the puzzle was completed, teams were allowed to go to the Finish Line.
In a special challenge, after the race ended, titled "The Final Amazing Challenge, " the second and third place teams competed for a new GMC Yukon. Using the maps they completed, all team members ran out to twelve clueboxes, one cluebox at a time. In the clueboxes were miniature cutouts of things they had done on the race. They then ran back to the map and placed the cutout on the state or country they had done the thing in. They then ran back out and continued the same pattern. Once done, teams asked Phil if they were right. If they were right, they won. The Bransens won the challenge. This post-race challenge was shown only at CBS.com.
