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BOSTON MARATHON 2025

Sara Denison

Bib: 13279•F

TX

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 36%
Gender (Female)
#0 / 12228
Top 19%
Division (F18-39)
#0 / 5469
Top 33%
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
7:25/mi
23:04
↑ 97↓ 3451.5%
10K· 6.21 mi
7:33/mi
46:30
↑ 79↓ 1380.4%
15K· 9.32 mi
7:33/mi
1:09:56
↑ 67↓ 78
20K· 12.43 mi
7:38/mi
1:33:40
↑ 106↓ 860.1%
Half· 13.11 mi
7:34/mi
1:38:50
↑ 19↓ 370.5%
25K· 15.53 mi
7:37/mi
1:57:19
↑ 66↓ 880.2%
30K· 18.64 mi
7:44/mi
2:21:22
↑ 181↓ 1480.2%
20M
7:48/mi
2:31:58
↑ 64↓ 500.2%
21M
8:07/mi
2:40:05
↑ 106↓ 241.6%
35K· 21.75 mi
7:38/mi
2:45:48
↑ 17↓ 861.7%
23M
7:50/mi
2:55:36
↑ 23↓ 630.6%
24M
7:40/mi
3:03:16
↓ 821.3%
40K· 24.85 mi
7:35/mi
3:09:45
↓ 200.3%
25.2M
8:16/mi
3:12:36
↑ 13↓ 160.2%
Finish· 26.22 mi
7:18/mi
3:20:02
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:38:50
Pace7:32 /mi
2nd Half
Distance13.11 mi
Time1:41:12
Pace7:43 /mi
📊Positive Split: 2.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:52:2623:047:2523:04
7:25
-
10K
6.21 mi11:15:5246:307:2923:26
7:33
+0:08
15K
9.32 mi11:39:181:09:567:3023:26
7:33
0:00
20K
12.43 mi12:03:021:33:407:3223:44
7:38
+0:05
Half
13.11 mi12:08:121:38:507:325:10
7:34
-0:04
25K
15.53 mi12:26:411:57:197:3318:29
7:37
+0:03
30K
18.64 mi12:50:442:21:227:3524:03
7:44
+0:07
20M
20.00 mi13:01:202:31:587:3610:36
7:48
+0:04
21M
21.00 mi13:09:272:40:057:378:07
8:07
+0:19
35K
21.75 mi13:15:102:45:487:375:43
7:38
-0:29
23M
23.00 mi13:24:582:55:367:389:48
7:50
+0:12
24M
24.00 mi13:32:383:03:167:387:40
7:40
-0:10
40K
24.85 mi13:39:073:09:457:386:29
7:35
-0:05
25.2M
25.20 mi13:41:583:12:367:392:51
8:16
+0:41
Finish
26.22 mi13:49:243:20:027:387:26
7:18
-0:58

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

7:18 /mi

Average Pace

7:38 /mi

Slowest Pace

8:16 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:09:04

95% of race

Time at Steady Pace

10:58

5% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:38 /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 mi10:52:2623:047:2523:04
7:25
#11580
10K
6.21 mi11:15:5246:307:2923:26
7:33
#11988
15K
9.32 mi11:39:181:09:567:3023:26
7:33
#12016
20K
12.43 mi12:03:021:33:407:3223:44
7:38
#11970
Half
13.11 mi12:08:121:38:507:325:10
7:34
#11973
25K
15.53 mi12:26:411:57:197:3318:29
7:37
#11783
30K
18.64 mi12:50:442:21:227:3524:03
7:44
#11308
20M
20.00 mi13:01:202:31:587:3610:36
7:48
#11073
21M
21.00 mi13:09:272:40:057:378:07
8:07
#10865
35K
21.75 mi13:15:102:45:487:375:43
7:38
#10801
23M
23.00 mi13:24:582:55:367:389:48
7:50
#10629
24M
24.00 mi13:32:383:03:167:387:40
7:40
#10522
40K
24.85 mi13:39:073:09:457:386:29
7:35
#10356
25.2M
25.20 mi13:41:583:12:367:392:51
8:16
#10297
Finish
26.22 mi13:49:243:20:027:387:26
7:18
#10160
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi115802563256312135(Top 43%)2977(Top 24%)2977(Top 54%)
10K6.21 mi3.10 mi11988-4082804-2412804-24112499(Top 44%)3087(Top 25%)3087(Top 56%)
15K9.32 mi3.11 mi12016-282849-452849-4512135(Top 43%)2977(Top 24%)2977(Top 54%)
20K12.43 mi3.11 mi11970+462853-42853-411868(Top 42%)2925(Top 24%)2925(Top 53%)
Half13.11 mi0.68 mi11973-32860-72860-712357(Top 44%)3124(Top 26%)3124(Top 57%)
25K15.53 mi2.42 mi11783+1902803+572803+5710954(Top 39%)2559(Top 21%)2559(Top 47%)
30K18.64 mi3.11 mi11308+4752630+1732630+1739498(Top 33%)2047(Top 17%)2047(Top 37%)
20M20.00 mi1.36 mi11073+2352539+912539+919057(Top 32%)2012(Top 16%)2012(Top 37%)
21M21.00 mi1.00 mi10865+2082482+572482+578093(Top 28%)1775(Top 15%)1775(Top 32%)
35K21.75 mi0.75 mi10801+642473+92473+99667(Top 34%)2442(Top 20%)2442(Top 45%)
23M23.00 mi1.25 mi10629+1722414+592414+598804(Top 31%)2173(Top 18%)2173(Top 40%)
24M24.00 mi1.00 mi10522+1072398+162398+168928(Top 31%)2291(Top 19%)2291(Top 42%)
40K24.85 mi0.85 mi10356+1662348+502348+507348(Top 26%)1700(Top 14%)1700(Top 31%)
25.2M25.20 mi0.35 mi10297+592344+42344+47537(Top 27%)1877(Top 15%)1877(Top 34%)
Finish26.22 mi1.02 mi10160+1372300+442300+447771(Top 27%)1969(Top 16%)1969(Top 36%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 43%
×21story building
+97ft-345ft

Overall

12135

Females

2977

F18-39

2977

5K→10K

3.1 - 6.2 mi

Top 44%
×5story building
+79ft-138ft

Overall

12499

Females

3087

F18-39

3087

10K→15K

6.2 - 9.3 mi

Top 43%
×3story building
+67ft-78ft

Overall

12135

Females

2977

F18-39

2977

15K→20K

9.3 - 12.4 mi

Top 42%
×5story building
+106ft-86ft

Overall

11868

Females

2925

F18-39

2925

20K→Half

12.4 - 13.1 mi

Top 44%
×2story building
+19ft-37ft

Overall

12357

Females

3124

F18-39

3124

Half→25K

13.1 - 15.5 mi

Top 39%
×4story building
+66ft-88ft

Overall

10954

Females

2559

F18-39

2559

25K→30K

15.5 - 18.6 mi

Top 33%
×9story building
+181ft-148ft

Overall

9498

Females

2047

F18-39

2047

30K→20M

18.6 - 20.0 mi

Top 32%
×5story building
+64ft-50ft

Overall

9057

Females

2012

F18-39

2012

20M→21M

20.0 - 21.0 mi

Top 28%
×8story building
+106ft-24ft

Overall

8093

Females

1775

F18-39

1775

21M→35K

21.0 - 21.8 mi

Top 34%
×7story building
+17ft-86ft

Overall

9667

Females

2442

F18-39

2442

35K→23M

21.8 - 23.0 mi

Top 31%
×5story building
+23ft-63ft

Overall

8804

Females

2173

F18-39

2173

23M→24M

23.0 - 24.0 mi

Top 31%
×6story building
+12ft-82ft

Overall

8928

Females

2291

F18-39

2291

24M→40K

24.0 - 24.9 mi

Top 26%
×1story
+6ft-20ft

Overall

7348

Females

1700

F18-39

1700

40K→25.2M

24.9 - 25.2 mi

Top 27%
×1story
+13ft-16ft

Overall

7537

Females

1877

F18-39

1877

25.2M→Finish

25.2 - 26.2 mi

Top 27%
×2story building
+22ft-21ft

Overall

7771

Females

1969

F18-39

1969

Passing Analysis

Category:
Athletes Passed
2588
Passed By
1168
Net Change
+1420
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#11580
5K → 10K104512-408#11580#11988
10K → 15K172200-28#11988#12016
15K → 20K215169+46#12016#11970
20K → Half3437-3#11970#11973
Half → 25K26272+190#11973#11783
25K → 30K50833+475#11783#11308
30K → 20M25318+235#11308#11073
20M → 21M22416+208#11073#10865
21M → 35K8622+64#10865#10801
35K → 23M19826+172#10801#10629
23M → 24M13326+107#10629#10522
24M → 40K17610+166#10522#10356
40K → 25.2M678+59#10356#10297
25.2M → Finish15619+137#10297#10160
TOTALS25881168+1420
📊

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