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BOSTON MARATHON 2025

Shelby Mills

Bib: 6497•F

WA

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 9%
Gender (Female)
#0 / 12228
Top 1%
Division (F18-39)
#0 / 5469
Top 2%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
19:50
Rank: #3020
Start → 5K
19:50 | 6:23/mi
10K· 6.21 mi
39:56
Rank: #3252 (-232)
5K → 10K
20:06 | 6:28/mi
15K· 9.32 mi
1:00:04
Rank: #3292 (-40)
10K → 15K
20:08 | 6:29/mi
20K· 12.43 mi
1:20:20
Rank: #3252 (+40)
15K → 20K
20:16 | 6:31/mi
Half· 13.11 mi
1:24:40
Rank: #3227 (+25)
20K → Half
4:20 | 6:21/mi
25K· 15.53 mi
1:41:36
Rank: #3637 (-410)
Half → 25K
16:56 | 6:59/mi
30K· 18.64 mi
2:01:48
Rank: #3241 (+396)
25K → 30K
20:12 | 6:30/mi
20M
2:10:48
Rank: #3103 (+138)
30K → 20M
9:00 | 6:37/mi
21M
2:17:43
Rank: #2997 (+106)
20M → 21M
6:55 | 6:55/mi
35K· 21.75 mi
2:22:24
Rank: #2890 (+107)
21M → 35K
4:41 | 6:16/mi
23M
2:30:38
Rank: #2790 (+100)
35K → 23M
8:14 | 6:35/mi
24M
2:37:00
Rank: #2684 (+106)
23M → 24M
6:22 | 6:22/mi
40K· 24.85 mi
2:42:36
Rank: #2615 (+69)
24M → 40K
5:36 | 6:33/mi
25.2M
2:45:03
Rank: #2584 (+31)
40K → 25.2M
2:27 | 7:06/mi
Finish· 26.22 mi
2:51:30
Rank: #2535 (+49)
25.2M → Finish
6:27 | 6:20/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:24:40
Pace6:27 /mi
2nd Half
Distance13.11 mi
Time1:26:50
Pace6:37 /mi
📊Positive Split: 2.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:24:5519:506:2319:50
6:23
-
10K
6.21 mi10:45:0139:566:2620:06
6:28
+0:05
15K
9.32 mi11:05:091:00:046:2720:08
6:29
+0:01
20K
12.43 mi11:25:251:20:206:2820:16
6:31
+0:02
Half
13.11 mi11:29:451:24:406:274:20
6:21
-0:10
25K
15.53 mi11:46:411:41:366:3216:56
6:59
+0:38
30K
18.64 mi12:06:532:01:486:3220:12
6:30
-0:29
20M
20.00 mi12:15:532:10:486:329:00
6:37
+0:07
21M
21.00 mi12:22:482:17:436:336:55
6:55
+0:18
35K
21.75 mi12:27:292:22:246:334:41
6:16
-0:39
23M
23.00 mi12:35:432:30:386:338:14
6:35
+0:19
24M
24.00 mi12:42:052:37:006:336:22
6:22
-0:13
40K
24.85 mi12:47:412:42:366:335:36
6:33
+0:11
25.2M
25.20 mi12:50:082:45:036:332:27
7:06
+0:33
Finish
26.22 mi12:56:352:51:306:336:27
6:20
-0:46

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

6:16 /mi

Average Pace

6:33 /mi

Slowest Pace

7:06 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:25:12

85% of race

Time at Steady Pace

26:18

15% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 6:32 /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 mi10:24:5519:506:2319:50
6:23
#3020
10K
6.21 mi10:45:0139:566:2620:06
6:28
#3252
15K
9.32 mi11:05:091:00:046:2720:08
6:29
#3292
20K
12.43 mi11:25:251:20:206:2820:16
6:31
#3252
Half
13.11 mi11:29:451:24:406:274:20
6:21
#3227
25K
15.53 mi11:46:411:41:366:3216:56
6:59
#3637
30K
18.64 mi12:06:532:01:486:3220:12
6:30
#3241
20M
20.00 mi12:15:532:10:486:329:00
6:37
#3103
21M
21.00 mi12:22:482:17:436:336:55
6:55
#2997
35K
21.75 mi12:27:292:22:246:334:41
6:16
#2890
23M
23.00 mi12:35:432:30:386:338:14
6:35
#2790
24M
24.00 mi12:42:052:37:006:336:22
6:22
#2684
40K
24.85 mi12:47:412:42:366:335:36
6:33
#2615
25.2M
25.20 mi12:50:082:45:036:332:27
7:06
#2584
Finish
26.22 mi12:56:352:51:306:336:27
6:20
#2535
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi30201441443448(Top 12%)174(Top 1%)174(Top 3%)
10K6.21 mi3.10 mi3252-232155-11155-113529(Top 12%)180(Top 1%)180(Top 3%)
15K9.32 mi3.11 mi3292-40156-1156-13448(Top 12%)174(Top 1%)174(Top 3%)
20K12.43 mi3.11 mi3252+40149+7149+73270(Top 12%)164(Top 1%)164(Top 3%)
Half13.11 mi0.68 mi3227+25147+2147+22854(Top 10%)119(Top 1.0%)119(Top 2%)
25K15.53 mi2.42 mi3637-410194-47194-476239(Top 22%)646(Top 5%)646(Top 12%)
30K18.64 mi3.11 mi3241+396160+34160+342000(Top 7%)93(Top 0.8%)93(Top 2%)
20M20.00 mi1.36 mi3103+138153+7153+72150(Top 8%)111(Top 0.9%)111(Top 2%)
21M21.00 mi1.00 mi2997+106148+5148+51967(Top 7%)107(Top 0.9%)107(Top 2%)
35K21.75 mi0.75 mi2890+107140+8140+81500(Top 5%)81(Top 0.7%)81(Top 1%)
23M23.00 mi1.25 mi2790+100136+4136+41756(Top 6%)106(Top 0.9%)106(Top 2%)
24M24.00 mi1.00 mi2684+106131+5131+51566(Top 6%)95(Top 0.8%)95(Top 2%)
40K24.85 mi0.85 mi2615+69129+2129+21820(Top 6%)131(Top 1%)131(Top 2%)
25.2M25.20 mi0.35 mi2584+311291291863(Top 7%)156(Top 1%)156(Top 3%)
Finish26.22 mi1.02 mi2535+49127+2127+22033(Top 7%)156(Top 1%)156(Top 3%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 12%
×21stories
+97ft-345ft

Overall

3448

Females

174

F18-39

174

5K→10K

3.1 - 6.2 mi

Top 12%
×5stories
+79ft-138ft

Overall

3529

Females

180

F18-39

180

10K→15K

6.2 - 9.3 mi

Top 12%
×3stories
+67ft-78ft

Overall

3448

Females

174

F18-39

174

15K→20K

9.3 - 12.4 mi

Top 12%
×5stories
+106ft-86ft

Overall

3270

Females

164

F18-39

164

20K→Half

12.4 - 13.1 mi

Top 10%
×2stories
+19ft-37ft

Overall

2854

Females

119

F18-39

119

Half→25K

13.1 - 15.5 mi

Top 22%
×4stories
+66ft-88ft

Overall

6239

Females

646

F18-39

646

25K→30K

15.5 - 18.6 mi

Top 7%
×9stories
+181ft-148ft

Overall

2000

Females

93

F18-39

93

30K→20M

18.6 - 20.0 mi

Top 8%
×5stories
+64ft-50ft

Overall

2150

Females

111

F18-39

111

20M→21M

20.0 - 21.0 mi

Top 7%
×8stories
+106ft-24ft

Overall

1967

Females

107

F18-39

107

21M→35K

21.0 - 21.8 mi

Top 5%
×7stories
+17ft-86ft

Overall

1500

Females

81

F18-39

81

35K→23M

21.8 - 23.0 mi

Top 6%
×5stories
+23ft-63ft

Overall

1756

Females

106

F18-39

106

23M→24M

23.0 - 24.0 mi

Top 6%
×6stories
+12ft-82ft

Overall

1566

Females

95

F18-39

95

24M→40K

24.0 - 24.9 mi

Top 6%
×1story
+6ft-20ft

Overall

1820

Females

131

F18-39

131

40K→25.2M

24.9 - 25.2 mi

Top 7%
×1story
+13ft-16ft

Overall

1863

Females

156

F18-39

156

25.2M→Finish

25.2 - 26.2 mi

Top 7%
×2stories
+22ft-21ft

Overall

2033

Females

156

F18-39

156

Passing Analysis

Category:
Athletes Passed
1411
Passed By
926
Net Change
+485
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#3020
5K → 10K51283-232#3020#3252
10K → 15K74114-40#3252#3292
15K → 20K10565+40#3292#3252
20K → Half294+25#3252#3227
Half → 25K14424-410#3227#3637
25K → 30K3971+396#3637#3241
30K → 20M1424+138#3241#3103
20M → 21M1082+106#3103#2997
21M → 35K1081+107#2997#2890
35K → 23M1044+100#2890#2790
23M → 24M1104+106#2790#2684
24M → 40K778+69#2684#2615
40K → 25.2M332+31#2615#2584
25.2M → Finish5910+49#2584#2535
TOTALS1411926+485
📊

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