By carefully controlling the pace of your mount, you can maintain overland journeys for much longer than normal.
Benefit: When traveling overland while mounted, if your mount would suffer the penalties of making a forced march, you may make a special Ride check with a DC equal to 10 + the number of hours traveled overland so far. If this check is successful, then for the next hour of travel, your mount does not suffer the negative effects of a forced march, although its speed is treated as 10 ft. less than it actually is for the purposes of how far you travel during that hour. You may continue to make this check each hour until you either stop traveling or you fail the check (and your mount begins to suffer the penalties of a forced march). Your mount might still suffer similar consequences from environmental conditions, starvation, sleep deprivation, or similar circumstances.