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BOSTON MARATHON 2025

Lillian Symonds

Bib: 16202•F

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 27%
Gender (Female)
#0 / 12228
Top 10%
Division (F18-39)
#0 / 5469
Top 18%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
23:00
Rank: #11355
Start → 5K
23:00 | 7:24/mi
10K· 6.21 mi
45:48
Rank: #10965 (+390)
5K → 10K
22:48 | 7:20/mi
15K· 9.32 mi
1:08:11
Rank: #10344 (+621)
10K → 15K
22:23 | 7:12/mi
20K· 12.43 mi
1:30:53
Rank: #9987 (+357)
15K → 20K
22:42 | 7:18/mi
Half· 13.11 mi
1:35:52
Rank: #9983 (+4)
20K → Half
4:59 | 7:18/mi
25K· 15.53 mi
1:53:32
Rank: #9647 (+336)
Half → 25K
17:40 | 7:17/mi
30K· 18.64 mi
2:16:12
Rank: #8897 (+750)
25K → 30K
22:40 | 7:18/mi
20M
2:26:10
Rank: #8595 (+302)
30K → 20M
9:58 | 7:20/mi
21M
2:33:58
Rank: #8391 (+204)
20M → 21M
7:48 | 7:48/mi
35K· 21.75 mi
2:39:17
Rank: #8263 (+128)
21M → 35K
5:19 | 7:06/mi
23M
2:48:25
Rank: #7999 (+264)
35K → 23M
9:08 | 7:18/mi
24M
2:55:32
Rank: #7834 (+165)
23M → 24M
7:07 | 7:07/mi
40K· 24.85 mi
3:01:49
Rank: #7710 (+124)
24M → 40K
6:17 | 7:21/mi
25.2M
3:04:38
Rank: #7662 (+48)
40K → 25.2M
2:49 | 8:10/mi
Finish· 26.22 mi
3:11:54
Rank: #7590 (+72)
25.2M → Finish
7:16 | 7:08/mi

The Course

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Half Splits

1st Half· via Half⚖️ Balanced
Distance13.11 mi
Time1:35:52
Pace7:19 /mi
2nd Half⚖️ Balanced
Distance13.11 mi
Time1:36:02
Pace7:20 /mi
📊Even Split: Consistent pacing between halves

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:56:3323:007:2423:00
7:24
-
10K
6.21 mi11:19:2145:487:2222:48
7:20
-0:04
15K
9.32 mi11:41:441:08:117:1922:23
7:12
-0:08
20K
12.43 mi12:04:261:30:537:1922:42
7:18
+0:06
Half
13.11 mi12:09:251:35:527:194:59
7:18
0:00
25K
15.53 mi12:27:051:53:327:1917:40
7:17
-0:01
30K
18.64 mi12:49:452:16:127:1822:40
7:18
+0:01
20M
20.00 mi12:59:432:26:107:189:58
7:20
+0:02
21M
21.00 mi13:07:312:33:587:207:48
7:48
+0:28
35K
21.75 mi13:12:502:39:177:195:19
7:06
-0:42
23M
23.00 mi13:21:582:48:257:199:08
7:18
+0:12
24M
24.00 mi13:29:052:55:327:197:07
7:07
-0:11
40K
24.85 mi13:35:223:01:497:196:17
7:21
+0:14
25.2M
25.20 mi13:38:113:04:387:202:49
8:10
+0:49
Finish
26.22 mi13:45:273:11:547:197:16
7:08
-1:02

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

7:06 /mi

Average Pace

7:19 /mi

Slowest Pace

8:10 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:09:05

99% of race

Time at Steady Pace

2:49

1% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:19 /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 mi10:56:3323:007:2423:00
7:24
#11355
10K
6.21 mi11:19:2145:487:2222:48
7:20
#10965
15K
9.32 mi11:41:441:08:117:1922:23
7:12
#10344
20K
12.43 mi12:04:261:30:537:1922:42
7:18
#9987
Half
13.11 mi12:09:251:35:527:194:59
7:18
#9983
25K
15.53 mi12:27:051:53:327:1917:40
7:17
#9647
30K
18.64 mi12:49:452:16:127:1822:40
7:18
#8897
20M
20.00 mi12:59:432:26:107:189:58
7:20
#8595
21M
21.00 mi13:07:312:33:587:207:48
7:48
#8391
35K
21.75 mi13:12:502:39:177:195:19
7:06
#8263
23M
23.00 mi13:21:582:48:257:199:08
7:18
#7999
24M
24.00 mi13:29:052:55:327:197:07
7:07
#7834
40K
24.85 mi13:35:223:01:497:196:17
7:21
#7710
25.2M
25.20 mi13:38:113:04:387:202:49
8:10
#7662
Finish
26.22 mi13:45:273:11:547:197:16
7:08
#7590
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi11355245724579179(Top 32%)1499(Top 12%)1499(Top 27%)
10K6.21 mi3.10 mi10965+3902285+1722285+17210654(Top 38%)2131(Top 17%)2131(Top 39%)
15K9.32 mi3.11 mi10344+6211992+2931992+2939179(Top 32%)1499(Top 12%)1499(Top 27%)
20K12.43 mi3.11 mi9987+3571861+1311861+1319100(Top 32%)1564(Top 13%)1564(Top 29%)
Half13.11 mi0.68 mi9983+41862-11862-110050(Top 35%)1956(Top 16%)1956(Top 36%)
25K15.53 mi2.42 mi9647+3361741+1211741+1218272(Top 29%)1321(Top 11%)1321(Top 24%)
30K18.64 mi3.11 mi8897+7501466+2751466+2756445(Top 23%)815(Top 7%)815(Top 15%)
20M20.00 mi1.36 mi8595+3021376+901376+906025(Top 21%)798(Top 7%)798(Top 15%)
21M21.00 mi1.00 mi8391+2041325+511325+516221(Top 22%)999(Top 8%)999(Top 18%)
35K21.75 mi0.75 mi8263+1281293+321293+326069(Top 21%)948(Top 8%)948(Top 17%)
23M23.00 mi1.25 mi7999+2641238+551238+555472(Top 19%)818(Top 7%)818(Top 15%)
24M24.00 mi1.00 mi7834+1651220+181220+185341(Top 19%)842(Top 7%)842(Top 15%)
40K24.85 mi0.85 mi7710+1241208+121208+125946(Top 21%)1116(Top 9%)1116(Top 20%)
25.2M25.20 mi0.35 mi7662+481202+61202+66914(Top 24%)1586(Top 13%)1586(Top 29%)
Finish26.22 mi1.02 mi7590+721204-21204-26602(Top 23%)1488(Top 12%)1488(Top 27%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 32%
×21stories
+97ft-345ft

Overall

9179

Females

1499

F18-39

1499

5K→10K

3.1 - 6.2 mi

Top 38%
×5stories
+79ft-138ft

Overall

10654

Females

2131

F18-39

2131

10K→15K

6.2 - 9.3 mi

Top 32%
×3stories
+67ft-78ft

Overall

9179

Females

1499

F18-39

1499

15K→20K

9.3 - 12.4 mi

Top 32%
×5stories
+106ft-86ft

Overall

9100

Females

1564

F18-39

1564

20K→Half

12.4 - 13.1 mi

Top 35%
×2stories
+19ft-37ft

Overall

10050

Females

1956

F18-39

1956

Half→25K

13.1 - 15.5 mi

Top 29%
×4stories
+66ft-88ft

Overall

8272

Females

1321

F18-39

1321

25K→30K

15.5 - 18.6 mi

Top 23%
×9stories
+181ft-148ft

Overall

6445

Females

815

F18-39

815

30K→20M

18.6 - 20.0 mi

Top 21%
×5stories
+64ft-50ft

Overall

6025

Females

798

F18-39

798

20M→21M

20.0 - 21.0 mi

Top 22%
×8stories
+106ft-24ft

Overall

6221

Females

999

F18-39

999

21M→35K

21.0 - 21.8 mi

Top 21%
×7stories
+17ft-86ft

Overall

6069

Females

948

F18-39

948

35K→23M

21.8 - 23.0 mi

Top 19%
×5stories
+23ft-63ft

Overall

5472

Females

818

F18-39

818

23M→24M

23.0 - 24.0 mi

Top 19%
×6stories
+12ft-82ft

Overall

5341

Females

842

F18-39

842

24M→40K

24.0 - 24.9 mi

Top 21%
×1story
+6ft-20ft

Overall

5946

Females

1116

F18-39

1116

40K→25.2M

24.9 - 25.2 mi

Top 24%
×1story
+13ft-16ft

Overall

6914

Females

1586

F18-39

1586

25.2M→Finish

25.2 - 26.2 mi

Top 23%
×2stories
+22ft-21ft

Overall

6602

Females

1488

F18-39

1488

Passing Analysis

Category:
Athletes Passed
4063
Passed By
298
Net Change
+3765
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#11355
5K → 10K516126+390#11355#10965
10K → 15K6309+621#10965#10344
15K → 20K38932+357#10344#9987
20K → Half3026+4#9987#9983
Half → 25K35014+336#9983#9647
25K → 30K7500+750#9647#8897
30K → 20M3075+302#8897#8595
20M → 21M21511+204#8595#8391
21M → 35K1346+128#8391#8263
35K → 23M2695+264#8263#7999
23M → 24M17813+165#7999#7834
24M → 40K13814+124#7834#7710
40K → 25.2M557+48#7710#7662
25.2M → Finish10230+72#7662#7590
TOTALS4063298+3765
📊

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