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BOSTON MARATHON 2025

Jenna Nelson

Bib: 18705•F

WA

0:00
0:00
/ mi
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Overall
#0 / 28404
Gender (Female)
#0 / 12228
Top 37%
Division (F18-39)
#0 / 5469
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
24:32
Rank: #15666
Start → 5K
24:32 | 7:54/mi
10K· 6.21 mi
49:04
Rank: #15646 (+20)
5K → 10K
24:32 | 7:54/mi
15K· 9.32 mi
1:14:01
Rank: #15855 (-209)
10K → 15K
24:57 | 8:02/mi
20K· 12.43 mi
1:39:06
Rank: #15735 (+120)
15K → 20K
25:05 | 8:04/mi
Half· 13.11 mi
1:44:31
Rank: #15723 (+12)
20K → Half
5:25 | 7:56/mi
25K· 15.53 mi
2:04:20
Rank: #15573 (+150)
Half → 25K
19:49 | 8:10/mi
30K· 18.64 mi
2:30:29
Rank: #15300 (+273)
25K → 30K
26:09 | 8:25/mi
20M
2:42:00
Rank: #15141 (+159)
30K → 20M
11:31 | 8:28/mi
21M
2:51:03
Rank: #14993 (+148)
20M → 21M
9:03 | 9:03/mi
35K· 21.75 mi
2:57:12
Rank: #14927 (+66)
21M → 35K
6:09 | 8:13/mi
23M
3:07:43
Rank: #14752 (+175)
35K → 23M
10:31 | 8:24/mi
24M
3:15:56
Rank: #14642 (+110)
23M → 24M
8:13 | 8:13/mi
40K· 24.85 mi
3:23:01
Rank: #14507 (+135)
24M → 40K
7:05 | 8:17/mi
25.2M
3:26:11
Rank: #14474 (+33)
40K → 25.2M
3:10 | 9:11/mi
Finish· 26.22 mi
3:34:28
Rank: #14407 (+67)
25.2M → Finish
8:17 | 8:08/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:44:31
Pace7:58 /mi
2nd Half
Distance13.11 mi
Time1:49:57
Pace8:23 /mi
📊Positive Split: 5.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:15:1724:327:5424:32
7:54
-
10K
6.21 mi11:39:4949:047:5424:32
7:54
0:00
15K
9.32 mi12:04:461:14:017:5624:57
8:02
+0:08
20K
12.43 mi12:29:511:39:067:5825:05
8:04
+0:02
Half
13.11 mi12:35:161:44:317:585:25
7:56
-0:08
25K
15.53 mi12:55:052:04:208:0019:49
8:10
+0:14
30K
18.64 mi13:21:142:30:298:0426:09
8:25
+0:15
20M
20.00 mi13:32:452:42:008:0611:31
8:28
+0:03
21M
21.00 mi13:41:482:51:038:099:03
9:03
+0:35
35K
21.75 mi13:47:572:57:128:096:09
8:13
-0:50
23M
23.00 mi13:58:283:07:438:1010:31
8:24
+0:11
24M
24.00 mi14:06:413:15:568:108:13
8:13
-0:11
40K
24.85 mi14:13:463:23:018:107:05
8:17
+0:04
25.2M
25.20 mi14:16:563:26:118:113:10
9:11
+0:54
Finish
26.22 mi14:25:133:34:288:118:17
8:08
-1:03

Checkpoints & Pacing

📈Pace Line

Pace Progression

Track your pace changes throughout the race. Dot colors mark your quickest to easiest segments, relative to your own pace.

Fastest Pace

7:54 /mi

Average Pace

8:11 /mi

Slowest Pace

9:11 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:22:15

94% of race

Time at Steady Pace

12:13

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:11 /mi

Loading chart...
Faster pace (< avg)
Steady pace (≈ avg)
Slower pace (> avg)

🎨Heatmap

Pace Heatmap

Where you sped up and eased off relative to your own pace across the race. Colors are relative to your own range, not to other runners.

Loading...
0mi6.6mi13.1mi19.7mi26.2mi
Pace:
Faster
Steady
Slower

Click or hover over segments to see details

✨Sparklines

Checkpoint Splits with Pace Trends

Overall Pace Trend

CheckpointDistanceTime of DayTimeAvg PaceSegmentPaceTrendRank
5K
3.11 mi11:15:1724:327:5424:32
7:54
#15666
10K
6.21 mi11:39:4949:047:5424:32
7:54
#15646
15K
9.32 mi12:04:461:14:017:5624:57
8:02
#15855
20K
12.43 mi12:29:511:39:067:5825:05
8:04
#15735
Half
13.11 mi12:35:161:44:317:585:25
7:56
#15723
25K
15.53 mi12:55:052:04:208:0019:49
8:10
#15573
30K
18.64 mi13:21:142:30:298:0426:09
8:25
#15300
20M
20.00 mi13:32:452:42:008:0611:31
8:28
#15141
21M
21.00 mi13:41:482:51:038:099:03
9:03
#14993
35K
21.75 mi13:47:572:57:128:096:09
8:13
#14927
23M
23.00 mi13:58:283:07:438:1010:31
8:24
#14752
24M
24.00 mi14:06:413:15:568:108:13
8:13
#14642
40K
24.85 mi14:13:463:23:018:107:05
8:17
#14507
25.2M
25.20 mi14:16:563:26:118:113:10
9:11
#14474
Finish
26.22 mi14:25:133:34:288:118:17
8:08
#14407
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi156664933493316280(Top 57%)5300(Top 43%)5300(Top 97%)
10K6.21 mi3.10 mi15646+204922+114922+1115647(Top 55%)4914(Top 40%)4914(Top 90%)
15K9.32 mi3.11 mi15855-2095048-1265048-12616280(Top 57%)5300(Top 43%)5300(Top 97%)
20K12.43 mi3.11 mi15735+1205003+455003+4515459(Top 54%)4890(Top 40%)4890(Top 89%)
Half13.11 mi0.68 mi15723+124999+44999+415467(Top 54%)4867(Top 40%)4867(Top 89%)
25K15.53 mi2.42 mi15573+1504925+744925+7415131(Top 53%)4803(Top 39%)4803(Top 88%)
30K18.64 mi3.11 mi15300+2734822+1034822+10314248(Top 50%)4507(Top 37%)4507(Top 82%)
20M20.00 mi1.36 mi15141+1594783+394783+3913648(Top 48%)4321(Top 35%)4321(Top 79%)
21M21.00 mi1.00 mi14993+1484715+684715+6813827(Top 49%)4533(Top 37%)4533(Top 83%)
35K21.75 mi0.75 mi14927+664695+204695+2013791(Top 49%)4571(Top 37%)4571(Top 84%)
23M23.00 mi1.25 mi14752+1754630+654630+6512716(Top 45%)4114(Top 34%)4114(Top 75%)
24M24.00 mi1.00 mi14642+1104594+364594+3612727(Top 45%)4182(Top 34%)4182(Top 76%)
40K24.85 mi0.85 mi14507+1354551+434551+4312097(Top 43%)3970(Top 32%)3970(Top 73%)
25.2M25.20 mi0.35 mi14474+334546+54546+512888(Top 45%)4446(Top 36%)4446(Top 81%)
Finish26.22 mi1.02 mi14407+674542+44542+413816(Top 49%)4862(Top 40%)4862(Top 89%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 57%
×21stories
+97ft-345ft

Overall

16280

Females

5300

F18-39

5300

5K→10K

3.1 - 6.2 mi

Top 55%
×5stories
+79ft-138ft

Overall

15647

Females

4914

F18-39

4914

10K→15K

6.2 - 9.3 mi

Top 57%
×3stories
+67ft-78ft

Overall

16280

Females

5300

F18-39

5300

15K→20K

9.3 - 12.4 mi

Top 54%
×5stories
+106ft-86ft

Overall

15459

Females

4890

F18-39

4890

20K→Half

12.4 - 13.1 mi

Top 54%
×2stories
+19ft-37ft

Overall

15467

Females

4867

F18-39

4867

Half→25K

13.1 - 15.5 mi

Top 53%
×4stories
+66ft-88ft

Overall

15131

Females

4803

F18-39

4803

25K→30K

15.5 - 18.6 mi

Top 50%
×9stories
+181ft-148ft

Overall

14248

Females

4507

F18-39

4507

30K→20M

18.6 - 20.0 mi

Top 48%
×5stories
+64ft-50ft

Overall

13648

Females

4321

F18-39

4321

20M→21M

20.0 - 21.0 mi

Top 49%
×8stories
+106ft-24ft

Overall

13827

Females

4533

F18-39

4533

21M→35K

21.0 - 21.8 mi

Top 49%
×7stories
+17ft-86ft

Overall

13791

Females

4571

F18-39

4571

35K→23M

21.8 - 23.0 mi

Top 45%
×5stories
+23ft-63ft

Overall

12716

Females

4114

F18-39

4114

23M→24M

23.0 - 24.0 mi

Top 45%
×6stories
+12ft-82ft

Overall

12727

Females

4182

F18-39

4182

24M→40K

24.0 - 24.9 mi

Top 43%
×1story
+6ft-20ft

Overall

12097

Females

3970

F18-39

3970

40K→25.2M

24.9 - 25.2 mi

Top 45%
×1story
+13ft-16ft

Overall

12888

Females

4446

F18-39

4446

25.2M→Finish

25.2 - 26.2 mi

Top 49%
×2stories
+22ft-21ft

Overall

13816

Females

4862

F18-39

4862

Passing Analysis

Category:
Athletes Passed
2502
Passed By
1243
Net Change
+1259
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#15666
5K → 10K333313+20#15666#15646
10K → 15K141350-209#15646#15855
15K → 20K251131+120#15855#15735
20K → Half3523+12#15735#15723
Half → 25K24797+150#15723#15573
25K → 30K380107+273#15573#15300
30K → 20M19839+159#15300#15141
20M → 21M18537+148#15141#14993
21M → 35K9024+66#14993#14927
35K → 23M21035+175#14927#14752
23M → 24M12616+110#14752#14642
24M → 40K15015+135#14642#14507
40K → 25.2M5017+33#14507#14474
25.2M → Finish10639+67#14474#14407
TOTALS25021243+1259
📊

Passing Visuals

Category:
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🔥Passing Intensity

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🔄Passing Circle

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🌊Position Flow

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🏃Race Lanes

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Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing