Dinosaur Racing

Of all the tales of Chult that reach the main continent, the most prolific are the stories of the famed Dinosaur Races of Port Nyanzaru, where daring riders take on exotic reptiles as their mounts and go charging through the streets to the exited cheers of the crowds.
Similarly to the events of the Grand Coliseum (which also features often as a staging ground for race starts and finishes), a smaller race generally can be seen once a week or so, larger ones every month at least, and during holidays, something spectacular.
Courses threat through the city streets, often encompassing much of the Market Ward, Merchant's Ward and Tiryki Anchorage, giving spectators several opportunities to view the event. Balconies and rooftops are densely packed, especially at those places offering wide views, or that sit within sight of several legs of the race. temporary stands are erected towards the starting and finish positions, around which tents are placed, or shops utilised as betting stations.
Most races involve each rider taking a single beast from start to finish, participants split into bipedal and quadrupedal classes - Dimetrodons, Hadrosaurs etc could be ridden or pull chariots, the bipedal Allosauruses and crowd winning Tyranosaurs attracted larger wagers and braver riders as their slower pace meant for more... confrontational competition. Some races, especially the more involved ones, take place over several courses during their length - riders will mount new beasts to take them into the air upon Pterodactyls, Plesiosaurs take them out into the Harbour Ward bay, chariots or howdah's can be mounted to larger beasts like Triceratops or Ankylosauruses. Sometimes extra tasks will have to be performed such as capturing flags or retrieving items from the bay floor.
Overall, injuries were common, but there is great investment in both riders and beasts, direct conflict was frowned upon and often results in sanctions against the riders and their backers, and great care of the beasts would be taken between races in the Tiryki Anchorage Dinosaur Pens. Occasionally, these restrictions would become more lenient for the really special events, where the huge crowds and betting money would cover for the more grievous injuries, reimbursing teams for lost beasts, and riders for their recovery time (if applicable...). These events would be known as "Unchained" races, a higher rate of injury and death often bringing in larger and more excitable crowds.
Everything to do with the great reptiles in Port Nyanzaru is overseen by the Merchant Prince Ifan Talro'a. Betting stations are sanctioned by him, teams are licensed by him, most of the animal handlers in the Tiryki Anchorage are funded by him. Match fixing, illicit unlicensed betting, and tampering with the courses or the dinosaurs, are met with his ire. (Whispers of Ifan's own actions in these realms are frequent, and very likely accurate).

The Tiryki Run

Somewhat of a practice or training event, this frequent race takes place in the Tiryki Anchorage every couple of days or so, where newer Dinosaurs can be tested or introduced to potential backers or recovering beasts can be warmed up and checked for real match fitness. Despite it's low prestige, the Run is very popular especially amongst the population living and working in the Anchorage, it's the most accessible event for them, basically having guaranteed front stand views. Frequently the locals are joined by training teams with potential sponsors. Heavy gamblers will also use the Run as a way to scout potential betting prospects for the bigger events.

Four Hills

One of the most prestigious events held in the city, this is an endurance race for single-saddle beasts that runs between all four hills of Port Nyanzaru. Often riders will chose beasts like the Hadrosaurus for it's reliability and more controllable disposition, but a few perhaps more foolhardy racers will opt for more temperamental dinosaurs such as the Deinonchyus or Pachycephalosaurs. Also fairly common are non-reptile mounts, Axe Beaks and Terrorbirds proving popular amongst racers that favour maneuverability over toughness.

Starting upon Mount Sibasa by the Hall of Gold, up to thirty racers charge across the Yklwazi bridge to Mount Yklwazi, circling around the Coliseum. From here, they head downhill and through the market Ward, and into the Merchant's Ward via the Grand Souk. Racers generally compete for sponsorships from merchants or nobles in the city, and gain help and favours from said sponsors as the course progresses, but the finale is where they can make a true impression. Up from the Temple of Gond they head into Temple Hill, surrounded by many noble Villas  including those of the Merchant Princes, who will often have at least a representative present observing. The Acolytes of the Temple of Savras grant boons to their own favoured racers, before they head over Throne Bridge to Throne Hill, where by Goldenthrone they may attempt to greatly impress the gathered nobles with their racing prowess before finishing. 
The winner may claim an audience with any Merchant Prince of their choice, and will inevitably gain much favour from their sponsors and anyone else wishing to share a taste of their victory and new found fame. There's also a considerable prize purse.

Coast Run

This course is built for either chariots, being drawn by pairs of smaller dinosaurs, or larger dinosaurs with mounted howdahs, such as Triceratopses, Stagasauruses, and Ankylosaurs. Though it does not carry the prestige of the Four Hills, the Coast Run is nevertheless very popular, especially amongst the workers of the Harbour Ward. Barges and light ships are regularly hired as mobile viewing platforms from the bay.
The course stretches from the Market Ward, looping around past the Dye Works and Bathhouse and towards Fort Nyanzaru before entering the Warehouse District and into the Merchant's Ward. The finish line is underneath Sune's Arch that leads over to the Temple of Sune.
Early renditions of this racer were more highly regulated but the nature of chariot and howdah based racing inevitably lead to jostling, collisions, ramming and other more aggressive maneuvers. Eventually officials gave in and the Coast Run fell under the umbrella of Unchained events. Overt and direct attacking of riders or mounts is still met with disqualification and potential sanctions, but otherwise attempts to hamper or otherwise discourage other teams are race legal.