You can go from Hated to Exalted with the Sons of Hodir just by completing the quest chain during Wrath Timewalking this week. The faction offers multi-seater mammoth mounts at Revered and Exalted.
Thanks to this method, you can completely skip grinding Relic of Ulduar for additional reputation.
How to Reach Exalted with the Sons of Hodir?
A total of 84,000 reputation is required to go from Hated to Exalted, and the “Mending Fences” and “A Spark of Hope” will give you 28,600 reputation each, which at that point, will be enough rep (85,800) to reach Exalted.
You can start the Sons of Hodir intro quest by going to K3 in Storm Peaks and talking to Gretchen Fizzlespark who offers the “They Took Our Men!” quest.
You can buy Reins of the Ice Mammoth (Alliance) / Reins of the Ice Mammoth (Horde) for 1,000 Gold at Revered and Reins of the Grand Ice Mammoth (Alliance) / Reins of the Grand Ice Mammoth (Horde) for 10,000 Gold at Exalted with the Sons of Hodir. Reputation discounts apply.
If you’re working on collecting 500 mounts for Otterworldly Ottuk Carrier, you can add 2 mounts to your collection.