BestRacesA drop bag is the one piece of race kit you pack for a version of yourself you haven’t met yet: the one at mile 24, or mile 70, at an aid station, opening a bag you zipped shut the night before. What belongs in it depends almost entirely on how far you’re going, and our index shows how far apart the two common ultra distances are.
By listed event, 71 races in our index offer a 50K footrace (we took out the bike rides, the Nordic ski race and the virtual mileage challenges by hand). 47 of them are still ahead on the calendar and 45 run on trail. Eleven offer a hundred-mile footrace; nine are still ahead and eight are on trail. That makes the 50K about six times as common, and it is where most people pack their first drop bag.
Four races, two bags
Four events in our index list a 50K and a 100-miler, so runners at both distances share the same course and the same aid stations:
| Race | Location | Date | Surface |
|---|---|---|---|
| Colorado River Run | Cedar Creek, TX | Nov 27, 2026 | trail |
| Dawn to Dusk to Dawn | Sharon Hill, PA | May 8, 2027 | track |
| Sangre de Cristo Trail Festival | Westcliffe, CO | Sep 25, 2027 | trail |
| Quantico 24-Hour | Quantico, VA | ran Oct 3, 2026 | road |
Two runners can stand at the same table on the same morning, one finishing by the afternoon and the other still going the next day. Their bags shouldn’t look alike.
The 50K bag fixes things
At 31 miles most runners finish in daylight, and the aid stations carry the food and water. So a 50K drop bag is mostly a repair kit for whatever goes wrong in the second half:
- Dry socks, and if your feet swell or blister, a second pair of shoes.
- Anti-chafe balm and tape, for the hot spot that showed up at mile 15.
- Your own fuel, if your stomach only trusts one gel or drink mix.
- One layer, in case the forecast was wrong.
Plenty of 50K runners don’t use a bag at all, and some races don’t offer one. If yours does, keep it small and pack it so you can find everything in under a minute. Time spent digging through a bag adds up just like time spent walking.
The 100 bag is about the night
At a hundred miles the bag has to get you through hours of darkness, and the calendar makes that worse. Four of the nine upcoming hundreds fall in the last five weeks of 2026: Colorado River Run (Nov 27), Brazos Bend 100 and Crooked Creek (both Dec 5), and Ancient Oaks (Dec 19). With days that short, a runner at any of them will be out after dark for a long time.
So the 100-mile bag is planned around sunset. Work out which aid station you’ll reach before it gets dark at your realistic pace, not your best-case pace, and put the night kit in that bag: a running headlamp and spare batteries, the warm layer, gloves and a hat.
Race pages help with both calls. The Western States pacing plan turns a goal time into your elapsed time at every mile, and Crooked Creek’s weather panel shows the low on December 5 for each of the last five years (17°F in 2024).
The other bags get the 50K’s repair kit, scaled up: a full change of socks and shoes, foot care, and more of the fuel you know you can stomach at mile 80. If you have a crew or a pacer, they don’t replace the bag. They are there for the stretches where the bag can’t reach you.
Loop and track courses make all of this easier. At Dawn to Dusk to Dawn you come past your gear every lap, so the bag is never far away. On a point-to-point course you get one chance at each bag.
The race’s rules come first
Every race publishes its own rules: which aid stations take bags, how big they can be, how to label them, and when and how you get them back. Those rules override any advice, including ours. Read them before you pack, and plan on not seeing the bag again until after you finish.
Practice on a 50K
The top-scoring ultras in our trail rankings are the Western States 100 (71.6), the Leadville Trail 100 (70.4), the JFK 50 (64.9), the Chuckanut 50K (59.4) and the Black Canyon 100K (52.9). Chuckanut also has the largest field of any 50K in our index, at 522. Pack a bag for a 50K first. You’ll find out what you actually reach for, and the bag you pack for your first hundred will be better for it.
As an Amazon Associate we earn from qualifying purchases. Gear links never affect which races we cover or how they rank.