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BOSTON MARATHON 2025

Cassandra Siegfried-Willard

Bib: 26011•F

MO

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

⏱️ Race Timeline

Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent
Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
5K· 3.11 mi
12:11/mi
37:51
↑ 97↓ 3451.5%
10K· 6.21 mi
12:11/mi
1:15:42
↑ 79↓ 1380.4%
15K· 9.32 mi
12:43/mi
1:55:12
↑ 67↓ 78
20K· 12.43 mi
13:29/mi
2:37:05
↑ 106↓ 860.1%
Half· 13.11 mi
12:54/mi
2:45:53
↑ 19↓ 370.5%
25K· 15.53 mi
13:36/mi
3:18:52
↑ 66↓ 880.2%
30K· 18.64 mi
13:58/mi
4:02:15
↑ 181↓ 1480.2%
20M
14:03/mi
4:21:21
↑ 64↓ 500.2%
21M
14:29/mi
4:35:50
↑ 106↓ 241.6%
35K· 21.75 mi
14:06/mi
4:46:23
↑ 17↓ 861.7%
23M
13:57/mi
5:03:51
↑ 23↓ 630.6%
24M
13:47/mi
5:17:38
↓ 821.3%
40K· 24.85 mi
14:09/mi
5:29:44
↓ 200.3%
25.2M
14:15/mi
5:34:39
↑ 13↓ 160.2%
Finish· 26.22 mi
12:41/mi
5:47:34
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:45:53
Pace12:39 /mi
2nd Half
Distance13.11 mi
Time3:01:41
Pace13:52 /mi
📊Positive Split: 9.5% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:53:0837:5112:1137:51
12:11
-
10K
6.21 mi12:30:591:15:4212:1137:51
12:11
0:00
15K
9.32 mi13:10:291:55:1212:2239:30
12:43
+0:32
20K
12.43 mi13:52:222:37:0512:3841:53
13:29
+0:46
Half
13.11 mi14:01:102:45:5312:398:48
12:54
-0:35
25K
15.53 mi14:34:093:18:5212:4832:59
13:36
+0:42
30K
18.64 mi15:17:324:02:1513:0043:23
13:58
+0:22
20M
20.00 mi15:36:384:21:2113:0419:06
14:03
+0:05
21M
21.00 mi15:51:074:35:5013:0814:29
14:29
+0:26
35K
21.75 mi16:01:404:46:2313:1010:33
14:06
-0:23
23M
23.00 mi16:19:085:03:5113:1317:28
13:57
-0:09
24M
24.00 mi16:32:555:17:3813:1413:47
13:47
-0:10
40K
24.85 mi16:45:015:29:4413:1612:06
14:09
+0:22
25.2M
25.20 mi16:49:565:34:3913:174:55
14:15
+0:06
Finish
26.22 mi17:02:515:47:3413:1612:55
12:41
-1:34

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

12:11 /mi

Average Pace

13:16 /mi

Slowest Pace

14:29 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:16:55

39% of race

Time at Steady Pace

3:16:10

56% of race

Time at Slower Pace

14:29

4% of race

Average Pace: 13:15 /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 mi11:53:0837:5112:1137:51
12:11
#28280
10K
6.21 mi12:30:591:15:4212:1137:51
12:11
#28210
15K
9.32 mi13:10:291:55:1212:2239:30
12:43
#28179
20K
12.43 mi13:52:222:37:0512:3841:53
13:29
#28177
Half
13.11 mi14:01:102:45:5312:398:48
12:54
#28170
25K
15.53 mi14:34:093:18:5212:4832:59
13:36
#28126
30K
18.64 mi15:17:324:02:1513:0043:23
13:58
#28060
20M
20.00 mi15:36:384:21:2113:0419:06
14:03
#28038
21M
21.00 mi15:51:074:35:5013:0814:29
14:29
#28004
35K
21.75 mi16:01:404:46:2313:1010:33
14:06
#28001
23M
23.00 mi16:19:085:03:5113:1317:28
13:57
#27983
24M
24.00 mi16:32:555:17:3813:1413:47
13:47
#27981
40K
24.85 mi16:45:015:29:4413:1612:06
14:09
#27969
25.2M
25.20 mi16:49:565:34:3913:174:55
14:15
#27957
Finish
26.22 mi17:02:515:47:3413:1612:55
12:41
#27942
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi28280121481214828053(Top 99%)12008(Top 98%)12008(Top 220%)
10K6.21 mi3.10 mi28210+7012104+4412104+4428036(Top 99%)11999(Top 98%)11999(Top 219%)
15K9.32 mi3.11 mi28179+3112084+2012084+2028053(Top 99%)12008(Top 98%)12008(Top 220%)
20K12.43 mi3.11 mi28177+212085-112085-128071(Top 99%)12043(Top 98%)12043(Top 220%)
Half13.11 mi0.68 mi28170+712084+112084+127956(Top 98%)11980(Top 98%)11980(Top 219%)
25K15.53 mi2.42 mi28126+4412062+2212062+2227676(Top 97%)11815(Top 97%)11815(Top 216%)
30K18.64 mi3.11 mi28060+6612022+4012022+4027485(Top 97%)11771(Top 96%)11771(Top 215%)
20M20.00 mi1.36 mi28038+2212015+712015+727335(Top 96%)11729(Top 96%)11729(Top 214%)
21M21.00 mi1.00 mi28004+3411997+1811997+1826692(Top 94%)11420(Top 93%)11420(Top 209%)
35K21.75 mi0.75 mi28001+3119971199727735(Top 98%)11976(Top 98%)11976(Top 219%)
23M23.00 mi1.25 mi27983+1811992+511992+527278(Top 96%)11743(Top 96%)11743(Top 215%)
24M24.00 mi1.00 mi27981+211996-411996-427507(Top 97%)11890(Top 97%)11890(Top 217%)
40K24.85 mi0.85 mi27969+1211994+211994+227288(Top 96%)11784(Top 96%)11784(Top 215%)
25.2M25.20 mi0.35 mi27957+1211989+511989+526532(Top 93%)11448(Top 94%)11448(Top 209%)
Finish26.22 mi1.02 mi27942+1511982+711982+727411(Top 97%)11831(Top 97%)11831(Top 216%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 99%
×21story building
+97ft-345ft

Overall

28053

Females

12008

F18-39

12008

5K→10K

3.1 - 6.2 mi

Top 99%
×5story building
+79ft-138ft

Overall

28036

Females

11999

F18-39

11999

10K→15K

6.2 - 9.3 mi

Top 99%
×3story building
+67ft-78ft

Overall

28053

Females

12008

F18-39

12008

15K→20K

9.3 - 12.4 mi

Top 99%
×5story building
+106ft-86ft

Overall

28071

Females

12043

F18-39

12043

20K→Half

12.4 - 13.1 mi

Top 98%
×2story building
+19ft-37ft

Overall

27956

Females

11980

F18-39

11980

Half→25K

13.1 - 15.5 mi

Top 97%
×4story building
+66ft-88ft

Overall

27676

Females

11815

F18-39

11815

25K→30K

15.5 - 18.6 mi

Top 97%
×9story building
+181ft-148ft

Overall

27485

Females

11771

F18-39

11771

30K→20M

18.6 - 20.0 mi

Top 96%
×5story building
+64ft-50ft

Overall

27335

Females

11729

F18-39

11729

20M→21M

20.0 - 21.0 mi

Top 94%
×8story building
+106ft-24ft

Overall

26692

Females

11420

F18-39

11420

21M→35K

21.0 - 21.8 mi

Top 98%
×7story building
+17ft-86ft

Overall

27735

Females

11976

F18-39

11976

35K→23M

21.8 - 23.0 mi

Top 96%
×5story building
+23ft-63ft

Overall

27278

Females

11743

F18-39

11743

23M→24M

23.0 - 24.0 mi

Top 97%
×6story building
+12ft-82ft

Overall

27507

Females

11890

F18-39

11890

24M→40K

24.0 - 24.9 mi

Top 96%
×1story
+6ft-20ft

Overall

27288

Females

11784

F18-39

11784

40K→25.2M

24.9 - 25.2 mi

Top 93%
×1story
+13ft-16ft

Overall

26532

Females

11448

F18-39

11448

25.2M→Finish

25.2 - 26.2 mi

Top 97%
×2story building
+22ft-21ft

Overall

27411

Females

11831

F18-39

11831

Passing Analysis

Category:
Athletes Passed
481
Passed By
143
Net Change
+338
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#28280
5K → 10K755+70#28280#28210
10K → 15K5120+31#28210#28179
15K → 20K3129+2#28179#28177
20K → Half169+7#28177#28170
Half → 25K539+44#28170#28126
25K → 30K748+66#28126#28060
30K → 20M3614+22#28060#28038
20M → 21M373+34#28038#28004
21M → 35K129+3#28004#28001
35K → 23M246+18#28001#27983
23M → 24M1816+2#27983#27981
24M → 40K186+12#27981#27969
40K → 25.2M142+12#27969#27957
25.2M → Finish227+15#27957#27942
TOTALS481143+338
📊

Passing Visuals

Category:
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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