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BOSTON MARATHON 2025

Shaina Cales

Bib: 10203•F

ID

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 33%
Gender (Female)
#0 / 12228
Top 16%
Division (F18-39)
#0 / 5469
Top 29%
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
7:12/mi
22:22
↑ 97↓ 3451.5%
10K· 6.21 mi
7:05/mi
44:21
↑ 79↓ 1380.4%
15K· 9.32 mi
7:10/mi
1:06:36
↑ 67↓ 78
20K· 12.43 mi
7:17/mi
1:29:13
↑ 106↓ 860.1%
Half· 13.11 mi
7:11/mi
1:34:07
↑ 19↓ 370.5%
25K· 15.53 mi
7:25/mi
1:52:05
↑ 66↓ 880.2%
30K· 18.64 mi
7:56/mi
2:16:45
↑ 181↓ 1480.2%
20M
8:14/mi
2:27:56
↑ 64↓ 500.2%
21M
8:31/mi
2:36:27
↑ 106↓ 241.6%
35K· 21.75 mi
8:31/mi
2:42:50
↑ 17↓ 861.7%
23M
8:23/mi
2:53:20
↑ 23↓ 630.6%
24M
8:11/mi
3:01:31
↓ 821.3%
40K· 24.85 mi
7:54/mi
3:08:16
↓ 200.3%
25.2M
7:56/mi
3:11:00
↑ 13↓ 160.2%
Finish· 26.22 mi
6:44/mi
3:17:52
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:34:07
Pace7:11 /mi
2nd Half
Distance13.11 mi
Time1:43:45
Pace7:55 /mi
📊Positive Split: 10.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:48:3122:227:1222:22
7:12
-
10K
6.21 mi11:10:3044:217:0821:59
7:05
-0:07
15K
9.32 mi11:32:451:06:367:0922:15
7:10
+0:05
20K
12.43 mi11:55:221:29:137:1122:37
7:17
+0:07
Half
13.11 mi12:00:161:34:077:114:54
7:11
-0:06
25K
15.53 mi12:18:141:52:057:1317:58
7:25
+0:14
30K
18.64 mi12:42:542:16:457:2024:40
7:56
+0:31
20M
20.00 mi12:54:052:27:567:2411:11
8:14
+0:18
21M
21.00 mi13:02:362:36:277:278:31
8:31
+0:17
35K
21.75 mi13:08:592:42:507:296:23
8:31
0:00
23M
23.00 mi13:19:292:53:207:3210:30
8:23
-0:08
24M
24.00 mi13:27:403:01:317:348:11
8:11
-0:12
40K
24.85 mi13:34:253:08:167:346:45
7:54
-0:17
25.2M
25.20 mi13:37:093:11:007:352:44
7:56
+0:02
Finish
26.22 mi13:44:013:17:527:336:52
6:44
-1:12

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

6:44 /mi

Average Pace

7:33 /mi

Slowest Pace

8:31 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:58:57

60% of race

Time at Steady Pace

42:20

21% of race

Time at Slower Pace

36:35

18% of race

Average Pace: 7:33 /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 mi10:48:3122:227:1222:22
7:12
#9466
10K
6.21 mi11:10:3044:217:0821:59
7:05
#8932
15K
9.32 mi11:32:451:06:367:0922:15
7:10
#8889
20K
12.43 mi11:55:221:29:137:1122:37
7:17
#8797
Half
13.11 mi12:00:161:34:077:114:54
7:11
#8794
25K
15.53 mi12:18:141:52:057:1317:58
7:25
#8812
30K
18.64 mi12:42:542:16:457:2024:40
7:56
#9165
20M
20.00 mi12:54:052:27:567:2411:11
8:14
#9353
21M
21.00 mi13:02:362:36:277:278:31
8:31
#9406
35K
21.75 mi13:08:592:42:507:296:23
8:31
#9634
23M
23.00 mi13:19:292:53:207:3210:30
8:23
#9806
24M
24.00 mi13:27:403:01:317:348:11
8:11
#9911
40K
24.85 mi13:34:253:08:167:346:45
7:54
#9867
25.2M
25.20 mi13:37:093:11:007:352:44
7:56
#9769
Finish
26.22 mi13:44:013:17:527:336:52
6:44
#9469
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 mi9466157615768811(Top 31%)1346(Top 11%)1346(Top 25%)
10K6.21 mi3.10 mi8932+5341361+2151361+2158486(Top 30%)1179(Top 10%)1179(Top 22%)
15K9.32 mi3.11 mi8889+431349+121349+128811(Top 31%)1346(Top 11%)1346(Top 25%)
20K12.43 mi3.11 mi8797+921335+141335+148896(Top 31%)1480(Top 12%)1480(Top 27%)
Half13.11 mi0.68 mi8794+31341-61341-69023(Top 32%)1524(Top 12%)1524(Top 28%)
25K15.53 mi2.42 mi8812-181365-241365-249258(Top 33%)1754(Top 14%)1754(Top 32%)
30K18.64 mi3.11 mi9165-3531585-2201585-22010952(Top 39%)2753(Top 23%)2753(Top 50%)
20M20.00 mi1.36 mi9353-1881697-1121697-11212003(Top 42%)3436(Top 28%)3436(Top 63%)
21M21.00 mi1.00 mi9406-531758-611758-6110635(Top 37%)2938(Top 24%)2938(Top 54%)
35K21.75 mi0.75 mi9634-2281873-1151873-11515598(Top 55%)5588(Top 46%)5588(Top 102%)
23M23.00 mi1.25 mi9806-1722010-1372010-13712588(Top 44%)4037(Top 33%)4037(Top 74%)
24M24.00 mi1.00 mi9911-1052096-862096-8612463(Top 44%)4017(Top 33%)4017(Top 73%)
40K24.85 mi0.85 mi9867+442117-212117-219446(Top 33%)2647(Top 22%)2647(Top 48%)
25.2M25.20 mi0.35 mi9769+982085+322085+325678(Top 20%)1141(Top 9%)1141(Top 21%)
Finish26.22 mi1.02 mi9469+3001980+1051980+1054172(Top 15%)605(Top 5%)605(Top 11%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 31%
×21story building
+97ft-345ft

Overall

8811

Females

1346

F18-39

1346

5K→10K

3.1 - 6.2 mi

Top 30%
×5story building
+79ft-138ft

Overall

8486

Females

1179

F18-39

1179

10K→15K

6.2 - 9.3 mi

Top 31%
×3story building
+67ft-78ft

Overall

8811

Females

1346

F18-39

1346

15K→20K

9.3 - 12.4 mi

Top 31%
×5story building
+106ft-86ft

Overall

8896

Females

1480

F18-39

1480

20K→Half

12.4 - 13.1 mi

Top 32%
×2story building
+19ft-37ft

Overall

9023

Females

1524

F18-39

1524

Half→25K

13.1 - 15.5 mi

Top 33%
×4story building
+66ft-88ft

Overall

9258

Females

1754

F18-39

1754

25K→30K

15.5 - 18.6 mi

Top 39%
×9story building
+181ft-148ft

Overall

10952

Females

2753

F18-39

2753

30K→20M

18.6 - 20.0 mi

Top 42%
×5story building
+64ft-50ft

Overall

12003

Females

3436

F18-39

3436

20M→21M

20.0 - 21.0 mi

Top 37%
×8story building
+106ft-24ft

Overall

10635

Females

2938

F18-39

2938

21M→35K

21.0 - 21.8 mi

Top 55%
×7story building
+17ft-86ft

Overall

15598

Females

5588

F18-39

5588

35K→23M

21.8 - 23.0 mi

Top 44%
×5story building
+23ft-63ft

Overall

12588

Females

4037

F18-39

4037

23M→24M

23.0 - 24.0 mi

Top 44%
×6story building
+12ft-82ft

Overall

12463

Females

4017

F18-39

4017

24M→40K

24.0 - 24.9 mi

Top 33%
×1story
+6ft-20ft

Overall

9446

Females

2647

F18-39

2647

40K→25.2M

24.9 - 25.2 mi

Top 20%
×1story
+13ft-16ft

Overall

5678

Females

1141

F18-39

1141

25.2M→Finish

25.2 - 26.2 mi

Top 15%
×2story building
+22ft-21ft

Overall

4172

Females

605

F18-39

605

Passing Analysis

Category:
Athletes Passed
2060
Passed By
2062
Net Change
-3
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#9466
5K → 10K58046+534#9466#8932
10K → 15K186143+43#8932#8889
15K → 20K212120+92#8889#8797
20K → Half2926+3#8797#8794
Half → 25K153171-18#8794#8812
25K → 30K130483-353#8812#9165
30K → 20M54242-188#9165#9353
20M → 21M70123-53#9353#9406
21M → 35K27255-228#9406#9634
35K → 23M64236-172#9634#9806
23M → 24M55160-105#9806#9911
24M → 40K9853+44#9911#9867
40K → 25.2M1002+98#9867#9769
25.2M → Finish3022+300#9769#9469
TOTALS20602062-3
📊

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