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BOSTON MARATHON 2025

Claire Marston

Bib: 20238•F

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Female)
#0 / 12228
Top 48%
Masters (Masters Women)
#0 / 6759
Top 36%
Division (F50-54)
#0 / 1303
Top 30%
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
8:05/mi
25:08
↑ 97↓ 3451.5%
10K· 6.21 mi
8:07/mi
50:22
↑ 79↓ 1380.4%
15K· 9.32 mi
8:03/mi
1:15:22
↑ 67↓ 78
20K· 12.43 mi
8:08/mi
1:40:39
↑ 106↓ 860.1%
Half· 13.11 mi
8:01/mi
1:46:07
↑ 19↓ 370.5%
25K· 15.53 mi
8:21/mi
2:06:22
↑ 66↓ 880.2%
30K· 18.64 mi
8:51/mi
2:33:51
↑ 181↓ 1480.2%
20M
8:58/mi
2:46:02
↑ 64↓ 500.2%
21M
9:57/mi
2:55:59
↑ 106↓ 241.6%
35K· 21.75 mi
8:41/mi
3:02:29
↑ 17↓ 861.7%
23M
9:14/mi
3:14:03
↑ 23↓ 630.6%
24M
9:05/mi
3:23:08
↓ 821.3%
40K· 24.85 mi
9:25/mi
3:31:11
↓ 200.3%
25.2M
9:49/mi
3:34:34
↑ 13↓ 160.2%
Finish· 26.22 mi
8:35/mi
3:43:19
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:46:07
Pace8:06 /mi
2nd Half
Distance13.11 mi
Time1:57:12
Pace8:56 /mi
📊Positive Split: 10.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:17:3525:088:0525:08
8:05
-
10K
6.21 mi11:42:4950:228:0625:14
8:07
+0:02
15K
9.32 mi12:07:491:15:228:0525:00
8:03
-0:04
20K
12.43 mi12:33:061:40:398:0625:17
8:08
+0:05
Half
13.11 mi12:38:341:46:078:065:28
8:01
-0:07
25K
15.53 mi12:58:492:06:228:0820:15
8:21
+0:20
30K
18.64 mi13:26:182:33:518:1527:29
8:51
+0:30
20M
20.00 mi13:38:292:46:028:1812:11
8:58
+0:07
21M
21.00 mi13:48:262:55:598:239:57
9:57
+0:59
35K
21.75 mi13:54:563:02:298:236:30
8:41
-1:16
23M
23.00 mi14:06:303:14:038:2611:34
9:14
+0:33
24M
24.00 mi14:15:353:23:088:289:05
9:05
-0:09
40K
24.85 mi14:23:383:31:118:308:03
9:25
+0:20
25.2M
25.20 mi14:27:013:34:348:313:23
9:49
+0:24
Finish
26.22 mi14:35:463:43:198:318:45
8:35
-1:14

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

8:01 /mi

Average Pace

8:31 /mi

Slowest Pace

9:57 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:06:22

57% of race

Time at Steady Pace

54:55

25% of race

Time at Slower Pace

42:02

19% of race

Average Pace: 8:31 /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 mi11:17:3525:088:0525:08
8:05
#17283
10K
6.21 mi11:42:4950:228:0625:14
8:07
#17303
15K
9.32 mi12:07:491:15:228:0525:00
8:03
#16975
20K
12.43 mi12:33:061:40:398:0625:17
8:08
#16676
Half
13.11 mi12:38:341:46:078:065:28
8:01
#16632
25K
15.53 mi12:58:492:06:228:0820:15
8:21
#16546
30K
18.64 mi13:26:182:33:518:1527:29
8:51
#16550
20M
20.00 mi13:38:292:46:028:1812:11
8:58
#16525
21M
21.00 mi13:48:262:55:598:239:57
9:57
#16588
35K
21.75 mi13:54:563:02:298:236:30
8:41
#16554
23M
23.00 mi14:06:303:14:038:2611:34
9:14
#16592
24M
24.00 mi14:15:353:23:088:289:05
9:05
#16648
40K
24.85 mi14:23:383:31:118:308:03
9:25
#16720
25.2M
25.20 mi14:27:013:34:348:313:23
9:49
#16716
Finish
26.22 mi14:35:463:43:198:318:45
8:35
#16706
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF50-54Seg. OverallSeg. FemalesSeg. F50-54
5K3.11 mi3.11 mi172835909590916396(Top 58%)5377(Top 44%)5377(Top 413%)
10K6.21 mi3.10 mi17303-205909590917378(Top 61%)5926(Top 48%)5926(Top 455%)
15K9.32 mi3.11 mi16975+3285698+2115698+21116396(Top 58%)5377(Top 44%)5377(Top 413%)
20K12.43 mi3.11 mi16676+2995543+1555543+15515918(Top 56%)5167(Top 42%)5167(Top 397%)
Half13.11 mi0.68 mi16632+445525+185525+1816091(Top 57%)5252(Top 43%)5252(Top 403%)
25K15.53 mi2.42 mi16546+865489+365489+3616264(Top 57%)5463(Top 45%)5463(Top 419%)
30K18.64 mi3.11 mi16550-45554-655554-6516875(Top 59%)5967(Top 49%)5967(Top 458%)
20M20.00 mi1.36 mi16525+255570-165570-1616627(Top 59%)5935(Top 49%)5935(Top 455%)
21M21.00 mi1.00 mi16588-635629-595629-5918117(Top 64%)6854(Top 56%)6854(Top 526%)
35K21.75 mi0.75 mi16554+345632-35632-316637(Top 59%)6133(Top 50%)6133(Top 471%)
23M23.00 mi1.25 mi16592-385690-585690-5817513(Top 62%)6732(Top 55%)6732(Top 517%)
24M24.00 mi1.00 mi16648-565742-525742-5217805(Top 63%)6925(Top 57%)6925(Top 531%)
40K24.85 mi0.85 mi16720-725825-835825-8318352(Top 65%)7301(Top 60%)7301(Top 560%)
25.2M25.20 mi0.35 mi16716+45835-105835-1016196(Top 57%)6181(Top 51%)6181(Top 474%)
Finish26.22 mi1.02 mi16706+105853-185853-1816777(Top 59%)6438(Top 53%)6438(Top 494%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 58%
×21story building
+97ft-345ft

Overall

16396

Females

5377

F50-54

5377

5K→10K

3.1 - 6.2 mi

Top 61%
×5story building
+79ft-138ft

Overall

17378

Females

5926

F50-54

5926

10K→15K

6.2 - 9.3 mi

Top 58%
×3story building
+67ft-78ft

Overall

16396

Females

5377

F50-54

5377

15K→20K

9.3 - 12.4 mi

Top 56%
×5story building
+106ft-86ft

Overall

15918

Females

5167

F50-54

5167

20K→Half

12.4 - 13.1 mi

Top 57%
×2story building
+19ft-37ft

Overall

16091

Females

5252

F50-54

5252

Half→25K

13.1 - 15.5 mi

Top 57%
×4story building
+66ft-88ft

Overall

16264

Females

5463

F50-54

5463

25K→30K

15.5 - 18.6 mi

Top 59%
×9story building
+181ft-148ft

Overall

16875

Females

5967

F50-54

5967

30K→20M

18.6 - 20.0 mi

Top 59%
×5story building
+64ft-50ft

Overall

16627

Females

5935

F50-54

5935

20M→21M

20.0 - 21.0 mi

Top 64%
×8story building
+106ft-24ft

Overall

18117

Females

6854

F50-54

6854

21M→35K

21.0 - 21.8 mi

Top 59%
×7story building
+17ft-86ft

Overall

16637

Females

6133

F50-54

6133

35K→23M

21.8 - 23.0 mi

Top 62%
×5story building
+23ft-63ft

Overall

17513

Females

6732

F50-54

6732

23M→24M

23.0 - 24.0 mi

Top 63%
×6story building
+12ft-82ft

Overall

17805

Females

6925

F50-54

6925

24M→40K

24.0 - 24.9 mi

Top 65%
×1story
+6ft-20ft

Overall

18352

Females

7301

F50-54

7301

40K→25.2M

24.9 - 25.2 mi

Top 57%
×1story
+13ft-16ft

Overall

16196

Females

6181

F50-54

6181

25.2M→Finish

25.2 - 26.2 mi

Top 59%
×2story building
+22ft-21ft

Overall

16777

Females

6438

F50-54

6438

Passing Analysis

Category:
Athletes Passed
2155
Passed By
1578
Net Change
+577
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#17283
5K → 10K286306-20#17283#17303
10K → 15K40577+328#17303#16975
15K → 20K35758+299#16975#16676
20K → Half6420+44#16676#16632
Half → 25K194108+86#16632#16546
25K → 30K218222-4#16546#16550
30K → 20M12095+25#16550#16525
20M → 21M94157-63#16525#16588
21M → 35K7844+34#16588#16554
35K → 23M106144-38#16554#16592
23M → 24M59115-56#16592#16648
24M → 40K62134-72#16648#16720
40K → 25.2M3632+4#16720#16716
25.2M → Finish7666+10#16716#16706
TOTALS21551578+577
📊

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