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BOSTON MARATHON 2025

Sarah Summerhill

MI

Bib: 16878 F

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Female)
#0 / 12228
Masters (Masters Women)
#0 / 6759
Division (F45-49)
#0 / 1813
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
469 ft elev
5K· 3.11 mi
9:36/mi
29:48
↑ 97↓ 3451.5%
220 ft elev
10K· 6.21 mi
9:43/mi
59:58
↑ 79↓ 1380.4%
157 ft elev
15K· 9.32 mi
9:32/mi
1:29:34
↑ 67↓ 78
146 ft elev
20K· 12.43 mi
9:30/mi
1:59:04
↑ 106↓ 860.1%
165 ft elev
Half· 13.11 mi
9:13/mi
2:05:21
↑ 19↓ 370.5%
148 ft elev
25K· 15.53 mi
9:37/mi
2:28:41
↑ 66↓ 880.2%
127 ft elev
30K· 18.64 mi
9:38/mi
2:58:38
↑ 181↓ 1480.2%
138 ft elev
20M
9:25/mi
3:11:26
↑ 64↓ 500.2%
148 ft elev
21M
10:18/mi
3:21:44
↑ 106↓ 241.6%
227 ft elev
35K· 21.75 mi
8:27/mi
3:28:03
↑ 17↓ 861.7%
156 ft elev
23M
9:12/mi
3:39:34
↑ 23↓ 630.6%
116 ft elev
24M
8:40/mi
3:48:14
↓ 821.3%
34 ft elev
40K· 24.85 mi
9:00/mi
3:55:56
↓ 200.3%
20 ft elev
25.2M
10:15/mi
3:59:28
↑ 13↓ 160.2%
18 ft elev
Finish· 26.22 mi
8:11/mi
4:07:48
↑ 22↓ 21
17 ft elev
Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent

The Course

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Half Splits

1st Half· via Half
Distance13.11 mi
Time2:05:21
Pace9:34 /mi
2nd Half✓ Faster
Distance13.11 mi
Time2:02:27
Pace9:20 /mi
📊Negative Split: 2.3% faster second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:04:0929:489:3629:48
9:36
-
10K
6.21 mi11:34:1959:589:3930:10
9:43
+0:07
15K
9.32 mi12:03:551:29:349:3729:36
9:32
-0:11
20K
12.43 mi12:33:251:59:049:3529:30
9:30
-0:02
Half
13.11 mi12:39:422:05:219:346:17
9:13
-0:17
25K
15.53 mi13:03:022:28:419:3423:20
9:37
+0:24
30K
18.64 mi13:32:592:58:389:3529:57
9:38
+0:01
20M
20.00 mi13:45:473:11:269:3412:48
9:25
-0:13
21M
21.00 mi13:56:053:21:449:3610:18
10:18
+0:53
35K
21.75 mi14:02:243:28:039:346:19
8:27
-1:51
23M
23.00 mi14:13:553:39:349:3311:31
9:12
+0:45
24M
24.00 mi14:22:353:48:149:318:40
8:40
-0:32
40K
24.85 mi14:30:173:55:569:307:42
9:00
+0:20
25.2M
25.20 mi14:33:493:59:289:303:32
10:15
+1:15
Finish
26.22 mi14:42:094:07:489:278:20
8:11
-2:04

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

8:11 /mi

Average Pace

9:27 /mi

Slowest Pace

10:18 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

42:32

17% of race

Time at Steady Pace

3:11:26

77% of race

Time at Slower Pace

13:50

6% of race

Average Pace: 9:27 /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 mi11:04:0929:489:3629:48
9:36
#24536
10K
6.21 mi11:34:1959:589:3930:10
9:43
#24609
15K
9.32 mi12:03:551:29:349:3729:36
9:32
#24336
20K
12.43 mi12:33:251:59:049:3529:30
9:30
#23955
Half
13.11 mi12:39:422:05:219:346:17
9:13
#23899
25K
15.53 mi13:03:022:28:419:3423:20
9:37
#23614
30K
18.64 mi13:32:592:58:389:3529:57
9:38
#23044
20M
20.00 mi13:45:473:11:269:3412:48
9:25
#22786
21M
21.00 mi13:56:053:21:449:3610:18
10:18
#22583
35K
21.75 mi14:02:243:28:039:346:19
8:27
#22386
23M
23.00 mi14:13:553:39:349:3311:31
9:12
#22114
24M
24.00 mi14:22:353:48:149:318:40
8:40
#21888
40K
24.85 mi14:30:173:55:569:307:42
9:00
#21723
25.2M
25.20 mi14:33:493:59:289:303:32
10:15
#21664
Finish
26.22 mi14:42:094:07:489:278:20
8:11
#21444
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF45-49Seg. OverallSeg. FemalesSeg. F45-49
5K3.11 mi3.11 mi245369976997623819(Top 84%)9554(Top 78%)9554(Top 527%)
10K6.21 mi3.10 mi24609-7310010-3410010-3424647(Top 87%)10044(Top 82%)10044(Top 554%)
15K9.32 mi3.11 mi24336+2739864+1469864+14623819(Top 84%)9554(Top 78%)9554(Top 527%)
20K12.43 mi3.11 mi23955+3819669+1959669+19522888(Top 81%)9085(Top 74%)9085(Top 501%)
Half13.11 mi0.68 mi23899+569640+299640+2922644(Top 80%)8948(Top 73%)8948(Top 494%)
25K15.53 mi2.42 mi23614+2859486+1549486+15422272(Top 78%)8798(Top 72%)8798(Top 485%)
30K18.64 mi3.11 mi23044+5709214+2729214+27220519(Top 72%)7944(Top 65%)7944(Top 438%)
20M20.00 mi1.36 mi22786+2589093+1219093+12118849(Top 66%)7189(Top 59%)7189(Top 397%)
21M21.00 mi1.00 mi22583+2038994+998994+9919399(Top 68%)7559(Top 62%)7559(Top 417%)
35K21.75 mi0.75 mi22386+1978892+1028892+10215197(Top 54%)5359(Top 44%)5359(Top 296%)
23M23.00 mi1.25 mi22114+2728780+1128780+11217353(Top 61%)6645(Top 54%)6645(Top 367%)
24M24.00 mi1.00 mi21888+2268678+1028678+10215588(Top 55%)5701(Top 47%)5701(Top 314%)
40K24.85 mi0.85 mi21723+1658611+678611+6716393(Top 58%)6270(Top 51%)6270(Top 346%)
25.2M25.20 mi0.35 mi21664+598586+258586+2518172(Top 64%)7247(Top 59%)7247(Top 400%)
Finish26.22 mi1.02 mi21444+2208471+1158471+11514171(Top 50%)5047(Top 41%)5047(Top 278%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 84%
×21story building
+97ft-345ft

Overall

23819

Females

9554

F45-49

9554

5K→10K

3.1 - 6.2 mi

Top 87%
×5story building
+79ft-138ft

Overall

24647

Females

10044

F45-49

10044

10K→15K

6.2 - 9.3 mi

Top 84%
×3story building
+67ft-78ft

Overall

23819

Females

9554

F45-49

9554

15K→20K

9.3 - 12.4 mi

Top 81%
×5story building
+106ft-86ft

Overall

22888

Females

9085

F45-49

9085

20K→Half

12.4 - 13.1 mi

Top 80%
×2story building
+19ft-37ft

Overall

22644

Females

8948

F45-49

8948

Half→25K

13.1 - 15.5 mi

Top 78%
×4story building
+66ft-88ft

Overall

22272

Females

8798

F45-49

8798

25K→30K

15.5 - 18.6 mi

Top 72%
×9story building
+181ft-148ft

Overall

20519

Females

7944

F45-49

7944

30K→20M

18.6 - 20.0 mi

Top 66%
×5story building
+64ft-50ft

Overall

18849

Females

7189

F45-49

7189

20M→21M

20.0 - 21.0 mi

Top 68%
×8story building
+106ft-24ft

Overall

19399

Females

7559

F45-49

7559

21M→35K

21.0 - 21.8 mi

Top 54%
×7story building
+17ft-86ft

Overall

15197

Females

5359

F45-49

5359

35K→23M

21.8 - 23.0 mi

Top 61%
×5story building
+23ft-63ft

Overall

17353

Females

6645

F45-49

6645

23M→24M

23.0 - 24.0 mi

Top 55%
×6story building
+12ft-82ft

Overall

15588

Females

5701

F45-49

5701

24M→40K

24.0 - 24.9 mi

Top 58%
×1story
+6ft-20ft

Overall

16393

Females

6270

F45-49

6270

40K→25.2M

24.9 - 25.2 mi

Top 64%
×1story
+13ft-16ft

Overall

18172

Females

7247

F45-49

7247

25.2M→Finish

25.2 - 26.2 mi

Top 50%
×2story building
+22ft-21ft

Overall

14171

Females

5047

F45-49

5047

Passing Analysis

Category:
Athletes Passed
3419
Passed By
327
Net Change
+3092
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#24536
5K → 10K172245-73#24536#24609
10K → 15K30835+273#24609#24336
15K → 20K39211+381#24336#23955
20K → Half582+56#23955#23899
Half → 25K29712+285#23899#23614
25K → 30K5799+570#23614#23044
30K → 20M2613+258#23044#22786
20M → 21M2052+203#22786#22583
21M → 35K1970+197#22583#22386
35K → 23M2753+272#22386#22114
23M → 24M2260+226#22114#21888
24M → 40K1650+165#21888#21723
40K → 25.2M634+59#21723#21664
25.2M → Finish2211+220#21664#21444
TOTALS3419327+3092
📊

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