4. Grand Hyatt Muscat, Sultanate of Oman (Category 4/ 15,000 points)

In the years between 1951 and 1975, there were 23 Category 4  in the Atlantic Ocean.
All men start at Category 5 and all women start at Cat. 4. For the men to move up to Cat. 4, the most traveled route is to complete 10 massed-start races permitted by USA Cycling. The races must be at least 15 miles long if it's a road race and 10 miles long if it's a criterium.
In the years between 1976 and 2000, 24 Category 4  formed in the basin:
Power comes from the torque-tuned, liquid-cooled 951cc Arctic Cat H2 V-Twin 4-stroke with Electronic Fuel Injection, with a powered-up 90+-hp version in the X model. All three get an automatic transmission with TEAM Rapid Response clutches and feature electronic selectable 2WD/4WD and front differential lock. The one I bought this summer, the Fish Cat 4, is much better than any of the others.1. Park Hyatt Siem Reap, Kingdom of Cambodia (Category 4 / 15,000 points)2. Park Hyatt Saigon, Ho Chi Minh City, Vietnam (Category 4 / 15,000 points)
The first thing people notice with the Fat Cat-4 are the humongous tires. We went with a custom rim by Origin8 that has cutouts to keep the weight down. For some added bling, we can add some color with the WIDE Surly rim strips that show through the cutouts. Where the rubber hits the pavement we chose the Vee8 26x4in folding tires. The tire tread is good for riding on the road, the beach, snow, or anywhere you want to go. The new Genny 4 (optional), with a new integrated logic design, provides a class-first simultaneous dual-frequency signal output design. Alongside the familiar 33kHz locate signal for general purpose locates, the Genny 4 transmits a second frequency designed to facilitate location of small diameter cables such as telecoms and street lighting, including spurs. For tricky locates, the new power boost function enables the locate signal to travel further and deeper, and couple onto utilities more easily.Utah Trikes has been making Custom Quads since 2008 and the Cat-4 platform is the culmination of our experience. Our custom Cat-4 rear end interfaces with the Catrike frame and adds two-wheel drive to the trike. For the Fat Cat-4 we are using our own frewheel posi-traction geared differential and hardened steel axles. We can attach multiple drive interfaces to the differential included various middrives, gas and electric motor systems.This is my first category 4 race and my first race in Maryland. The course is 1.5 miles with a hill. It was 10 laps for a total of 15 fast paced miles. This is the full video with commentary.
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Amateur Bike Racing Archive: HC climb - "Hors Categorie" - (a French term for above category) climbs are the hardest rating/score given to any climb. All climb scores are based on distance, grade/elevation change, and maximum elevation. The combination of these factors drives all final climb categories and there is no subjective analysis used in the final scoring of any climb score. HC climbs will traditionally be very long (over 10 miles), very steep (average grades above 8 to 10%), or very high (above 11,000 feet) but again some extremely steep or long climbs could alone qualify it as an HC rated climb.

Cat 1 Climb - These rated climbs are the next most difficult after HC climbs. The exactly same methodology is used in determining their difficulty as HC climbs but they fall next in terms of overall difficulty. All climb scores are based on distance, grade/elevation change, and maximum elevation.

Cat 2 Climb - These rated climbs are the next most difficult after Cat 1 climbs. The exactly same methodology is used in determining their difficulty as Cat 1 climbs but they fall next in terms of overall difficulty. All climb scores are based on distance, grade/elevation change, and maximum elevation.

Cat 3 Climb - These rated climbs are the next most difficult after Cat 2 climbs. The exactly same methodology is used in determining their difficulty as Cat 2 climbs but they fall next in terms of overall difficulty. All climb scores are based on distance, grade/elevation change, and maximum elevation.

Cat 4 Climb - These rated climbs are the next most difficult after Cat 3 climbs. The exactly same methodology is used in determining their difficulty as Cat 3 climbs but they fall next in terms of overall difficulty. All climb scores are based on distance, grade/elevation change, and maximum elevation.

Cat 5 Climb - These rated climbs are the least difficult of all the categorized climbs. The exactly same methodology is used in determining their difficulty as Cat 4 climbs but they the least difficult of all the rated climbs. All climb scores are based on distance, grade/elevation change, and maximum elevation. For the tables that follow, note that if the field contains mixed categories (e.g., cat 3-4), then the number of starters is the number of riders that are the same category or higher as the person requesting the upgrade (e.g., in a cat 3-4 combined field, all riders count for a 4-3 upgrade, but only the 3’s count for a 3-2 upgrade.