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BOSTON MARATHON 2025

Sarah Chesney

Bib: 19490•F

TN

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 43%
Gender (Female)
#0 / 12228
Top 27%
Division (F18-39)
#0 / 5469
Top 45%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
23:51
Rank: #13771
Start → 5K
23:51 | 7:41/mi
10K· 6.21 mi
47:29
Rank: #13412 (+359)
5K → 10K
23:38 | 7:36/mi
15K· 9.32 mi
1:10:40
Rank: #12712 (+700)
10K → 15K
23:11 | 7:28/mi
20K· 12.43 mi
1:34:12
Rank: #12318 (+394)
15K → 20K
23:32 | 7:34/mi
Half· 13.11 mi
1:39:22
Rank: #12329 (-11)
20K → Half
5:10 | 7:34/mi
25K· 15.53 mi
1:57:58
Rank: #12128 (+201)
Half → 25K
18:36 | 7:40/mi
30K· 18.64 mi
2:23:21
Rank: #12177 (-49)
25K → 30K
25:23 | 8:10/mi
20M
2:34:39
Rank: #12171 (+6)
30K → 20M
11:18 | 8:19/mi
21M
2:42:58
Rank: #11966 (+205)
20M → 21M
8:19 | 8:19/mi
35K· 21.75 mi
2:49:11
Rank: #12060 (-94)
21M → 35K
6:13 | 8:19/mi
23M
2:59:35
Rank: #12029 (+31)
35K → 23M
10:25 | 8:19/mi
24M
3:07:54
Rank: #12082 (-53)
23M → 24M
8:19 | 8:19/mi
40K· 24.85 mi
3:15:07
Rank: #12110 (-28)
24M → 40K
7:13 | 8:26/mi
25.2M
3:18:02
Rank: #12025 (+85)
40K → 25.2M
2:55 | 8:29/mi
Finish· 26.22 mi
3:26:41
Rank: #12186 (-161)
25.2M → Finish
8:39 | 8:29/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:39:22
Pace7:35 /mi
2nd Half
Distance13.11 mi
Time1:47:19
Pace8:11 /mi
📊Positive Split: 8.0% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:15:3323:517:4123:51
7:41
-
10K
6.21 mi11:39:1147:297:3923:38
7:36
-0:05
15K
9.32 mi12:02:221:10:407:3523:11
7:28
-0:08
20K
12.43 mi12:25:541:34:127:3523:32
7:34
+0:06
Half
13.11 mi12:31:041:39:227:355:10
7:34
0:00
25K
15.53 mi12:49:401:57:587:3618:36
7:40
+0:06
30K
18.64 mi13:15:032:23:217:4125:23
8:10
+0:30
20M
20.00 mi13:26:212:34:397:4411:18
8:19
+0:09
21M
21.00 mi13:34:402:42:587:468:19
8:19
0:00
35K
21.75 mi13:40:532:49:117:476:13
8:19
0:00
23M
23.00 mi13:51:172:59:357:4810:25
8:19
0:00
24M
24.00 mi13:59:363:07:547:508:19
8:19
0:00
40K
24.85 mi14:06:493:15:077:517:13
8:26
+0:07
25.2M
25.20 mi14:09:443:18:027:522:55
8:29
+0:03
Finish
26.22 mi14:18:233:26:417:538:39
8:29
0:00

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

7:28 /mi

Average Pace

7:53 /mi

Slowest Pace

8:29 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:23:21

69% of race

Time at Steady Pace

1:03:20

31% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:53 /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 mi11:15:3323:517:4123:51
7:41
#13771
10K
6.21 mi11:39:1147:297:3923:38
7:36
#13412
15K
9.32 mi12:02:221:10:407:3523:11
7:28
#12712
20K
12.43 mi12:25:541:34:127:3523:32
7:34
#12318
Half
13.11 mi12:31:041:39:227:355:10
7:34
#12329
25K
15.53 mi12:49:401:57:587:3618:36
7:40
#12128
30K
18.64 mi13:15:032:23:217:4125:23
8:10
#12177
20M
20.00 mi13:26:212:34:397:4411:18
8:19
#12171
21M
21.00 mi13:34:402:42:587:468:19
8:19
#11966
35K
21.75 mi13:40:532:49:117:476:13
8:19
#12060
23M
23.00 mi13:51:172:59:357:4810:25
8:19
#12029
24M
24.00 mi13:59:363:07:547:508:19
8:19
#12082
40K
24.85 mi14:06:493:15:077:517:13
8:26
#12110
25.2M
25.20 mi14:09:443:18:027:522:55
8:29
#12025
Finish
26.22 mi14:18:233:26:417:538:39
8:29
#12186
Faster pace
Steady pace
Slower pace
Est.Checkpoint not recorded (estimated)
~Segment time uses estimated prior

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi137713756375611461(Top 40%)2615(Top 21%)2615(Top 48%)
10K6.21 mi3.10 mi13412+3593597+1593597+15913102(Top 46%)3432(Top 28%)3432(Top 63%)
15K9.32 mi3.11 mi12712+7003213+3843213+38411461(Top 40%)2615(Top 21%)2615(Top 48%)
20K12.43 mi3.11 mi12318+3943040+1733040+17311406(Top 40%)2691(Top 22%)2691(Top 49%)
Half13.11 mi0.68 mi12329-113056-163056-1612419(Top 44%)3186(Top 26%)3186(Top 58%)
25K15.53 mi2.42 mi12128+2012988+682988+6811345(Top 40%)2773(Top 23%)2773(Top 51%)
30K18.64 mi3.11 mi12177-493088-1003088-10012603(Top 44%)3619(Top 30%)3619(Top 66%)
20M20.00 mi1.36 mi12171+63123-353123-3512552(Top 44%)3735(Top 31%)3735(Top 68%)
21M21.00 mi1.00 mi11966+2053051+723051+729269(Top 33%)2293(Top 19%)2293(Top 42%)
35K21.75 mi0.75 mi12060-943129-783129-7814396(Top 51%)4927(Top 40%)4927(Top 90%)
23M23.00 mi1.25 mi12029+313150-213150-2112119(Top 43%)3812(Top 31%)3812(Top 70%)
24M24.00 mi1.00 mi12082-533216-663216-6613313(Top 47%)4488(Top 37%)4488(Top 82%)
40K24.85 mi0.85 mi12110-283261-453261-4513053(Top 46%)4464(Top 37%)4464(Top 82%)
25.2M25.20 mi0.35 mi12025+853238+233238+238694(Top 31%)2407(Top 20%)2407(Top 44%)
Finish26.22 mi1.02 mi12186-1613346-1083346-10816096(Top 57%)6091(Top 50%)6091(Top 111%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 40%
×21stories
+97ft-345ft

Overall

11461

Females

2615

F18-39

2615

5K→10K

3.1 - 6.2 mi

Top 46%
×5stories
+79ft-138ft

Overall

13102

Females

3432

F18-39

3432

10K→15K

6.2 - 9.3 mi

Top 40%
×3stories
+67ft-78ft

Overall

11461

Females

2615

F18-39

2615

15K→20K

9.3 - 12.4 mi

Top 40%
×5stories
+106ft-86ft

Overall

11406

Females

2691

F18-39

2691

20K→Half

12.4 - 13.1 mi

Top 44%
×2stories
+19ft-37ft

Overall

12419

Females

3186

F18-39

3186

Half→25K

13.1 - 15.5 mi

Top 40%
×4stories
+66ft-88ft

Overall

11345

Females

2773

F18-39

2773

25K→30K

15.5 - 18.6 mi

Top 44%
×9stories
+181ft-148ft

Overall

12603

Females

3619

F18-39

3619

30K→20M

18.6 - 20.0 mi

Top 44%
×5stories
+64ft-50ft

Overall

12552

Females

3735

F18-39

3735

20M→21M

20.0 - 21.0 mi

Top 33%
×8stories
+106ft-24ft

Overall

9269

Females

2293

F18-39

2293

21M→35K

21.0 - 21.8 mi

Top 51%
×7stories
+17ft-86ft

Overall

14396

Females

4927

F18-39

4927

35K→23M

21.8 - 23.0 mi

Top 43%
×5stories
+23ft-63ft

Overall

12119

Females

3812

F18-39

3812

23M→24M

23.0 - 24.0 mi

Top 47%
×6stories
+12ft-82ft

Overall

13313

Females

4488

F18-39

4488

24M→40K

24.0 - 24.9 mi

Top 46%
×1story
+6ft-20ft

Overall

13053

Females

4464

F18-39

4464

40K→25.2M

24.9 - 25.2 mi

Top 31%
×1story
+13ft-16ft

Overall

8694

Females

2407

F18-39

2407

25.2M→Finish

25.2 - 26.2 mi

Top 57%
×2stories
+22ft-21ft

Overall

16096

Females

6091

F18-39

6091

Passing Analysis

Category:
Athletes Passed
2892
Passed By
1307
Net Change
+1585
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#13771
5K → 10K494135+359#13771#13412
10K → 15K71919+700#13412#12712
15K → 20K42834+394#12712#12318
20K → Half2738-11#12318#12329
Half → 25K25251+201#12329#12128
25K → 30K233282-49#12128#12177
30K → 20M122116+6#12177#12171
20M → 21M22520+205#12171#11966
21M → 35K37131-94#11966#12060
35K → 23M11685+31#12060#12029
23M → 24M64117-53#12029#12082
24M → 40K5785-28#12082#12110
40K → 25.2M894+85#12110#12025
25.2M → Finish29190-161#12025#12186
TOTALS28921307+1585
📊

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