Weather
Climate Avg| Time | Temp | Dew Pt | Humidity | Wind | Conditions |
|---|---|---|---|---|---|
| Start | 59.7 – 59.7°F | 57° OK | 90 – 90% | 2 mph S | Clear sky |
| 8:00 AM | 62.6 – 62.6°F | 57° OK | 83 – 83% | 5 mph S | Clear sky |
| 9:00 AM | 68.1 – 68.1°F | 58° OK | 71 – 71% | 3 mph S | Clear sky |
| 10:00 AM | 73.4 – 73.4°F | 60° Sticky | 62 – 62% | 4 mph S | Clear sky |
| 11:00 AM | 78 – 78°F | 61° Sticky | 55 – 55% | 5 mph SW | Clear sky |
| Finish | 81.9 – 81.9°F | 61° Sticky | 49 – 49% | 4 mph SW | Clear sky |
Based on 3-year average for this date. Real forecast available in 68 days.
Elevation Profile
Course Stats
Mile Splits
| Mile | Grade |
|---|---|
| 1 | -0.6% |
| 2 | +0.0% |
| 3 | -0.1% |
| 4 | -0.3% |
| 5 | +0.1% |
| 6 | +0.0% |
| 7 | +0.0% |
| 8 | -0.1% |
| 9 | +0.0% |
| 10 | -0.1% |
| 11 | -0.2% |
| 12 | +0.3% |
| 13 | -0.1% |
| 14 | +0.1% |
| 15 | -0.1% |
| 16 | +0.1% |
| 17 | -0.1% |
| 18 | +0.1% |
| 19 | -0.2% |
| 20 | -0.1% |
| 21 | +0.2% |
| 22 | -0.1% |
| 23 | -0.1% |
| 24 | +0.1% |
| 25 | +0.2% |
| 26 | +0.0% |
| 27 | -0.3% |
| 28 | +0.4% |
| 29 | -0.3% |
| 30 | -0.2% |
| 31 | +0.0% |
| 32 | -0.2% |
| 33 | -0.1% |
| 34 | +0.2% |
| 35 | +0.1% |
| 36 | +0.0% |
| 37 | +0.1% |
| 38 | +0.3% |
| 39 | -0.2% |
| 40 | +0.5% |
| 41 | -0.2% |
| 42 | -0.2% |
| 43 | +0.5% |
| 44 | -0.1% |
| 45 | -0.4% |
| 46 | +0.0% |
| 47 | +0.0% |
| 48 | -0.1% |
| 49 | +0.0% |
| 50 | -1.2% |
| 51 | +1.3% |
| 52 | +0.0% |
| 53 | +0.0% |
| 54 | +0.1% |
| 55 | +0.1% |
| 56 | +0.3% |
| 57 | +0.0% |
| 58 | -0.4% |
| 59 | +0.1% |
| 60 | +0.4% |
| 61 | -0.7% |
| 62 | +0.2% |
| 63 | -0.2% |
| 64 | +0.0% |
| 65 | -0.1% |
| 66 | -0.1% |
| 67 | -0.2% |
| 68 | +0.1% |
| 69 | +0.1% |
| 70 | -0.1% |
| 71 | +0.1% |
| 72 | +0.1% |
| 73 | +0.0% |
| 74 | -0.2% |
| 75 | +0.4% |
| 76 | -0.3% |
| 77 | -0.1% |
| 78 | +0.0% |
| 79 | +0.1% |
| 80 | +0.0% |
| 81 | -0.1% |
| 82 | +0.1% |
| 83 | +0.3% |
| 84 | +0.0% |
| 85 | +0.0% |
| 86 | +0.4% |
| 87 | -0.6% |
| 88 | -0.6% |
| 89 | +0.0% |
| 90 | -0.1% |
| 91 | +0.1% |
| 92 | +0.0% |
| 93 | +0.1% |
| 94 | +0.0% |
| 95 | -0.3% |
| 96 | +0.9% |
| 97 | -0.6% |
| 98 | +0.4% |
| 99 | +0.6% |
| 100 | +1.3% |
RM Difficulty Index
Hennepin Hundred Pace Calculator & Race Plan
The Hennepin Hundred is a 100-mile ultra on the flat I&M Canal Trail in Illinois. Despite being flat, 100 miles of running accumulates 883 meters of gain from the gentle trail undulations. The real challenge is managing fatigue, nutrition, and sleep deprivation over 20+ hours.
Our ultra-distance fatigue model is especially relevant here. The pace drift from mile 1 to mile 100 is massive, and having realistic splits helps you manage your effort and crew logistics.
Hennepin Hundred FAQ
When is the next Hennepin Hundred?›
The next Hennepin Hundred is on Saturday, October 3, 2026.
How long is the Hennepin Hundred?›
The Hennepin Hundred is 100.0 miles (160.934 km). It runs in I&M Canal Trail, IL.
How much elevation gain does the Hennepin Hundred have?›
The Hennepin Hundred has about 2,897 ft (883 m) of climbing and 2,881 ft of descent, with a maximum grade of 11.7%.
Is the Hennepin Hundred flat, downhill, or hilly?›
The Hennepin Hundred starts and finishes at roughly the same elevation (net +5 m). With 2,897 ft of total climbing along the way, the profile rolls even though the net change is small.
How hard is the Hennepin Hundred?›
Runner's Math scores the Hennepin Hundred 36/100 (Moderate) — #1 of 1 ultra courses in our library, ranked by modeled time cost. The profile costs about 3:09 versus a flat course for a runner at 4:00-marathon pace.