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BOSTON MARATHON 2025

Samantha Jacoby

Bib: 17235•F

DC

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 46%
Gender (Female)
#0 / 12228
Top 31%
Division (F18-39)
#0 / 5469
Top 49%
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
7:29/mi
23:16
↑ 97↓ 3451.5%
10K· 6.21 mi
7:22/mi
46:08
↑ 79↓ 1380.4%
15K· 9.32 mi
7:23/mi
1:09:05
↑ 67↓ 78
20K· 12.43 mi
7:31/mi
1:32:25
↑ 106↓ 860.1%
Half· 13.11 mi
7:30/mi
1:37:32
↑ 19↓ 370.5%
25K· 15.53 mi
7:49/mi
1:56:29
↑ 66↓ 880.2%
30K· 18.64 mi
8:15/mi
2:22:08
↑ 181↓ 1480.2%
20M
8:42/mi
2:33:58
↑ 64↓ 500.2%
21M
8:51/mi
2:42:49
↑ 106↓ 241.6%
35K· 21.75 mi
8:16/mi
2:49:00
↑ 17↓ 861.7%
23M
10:42/mi
3:02:24
↑ 23↓ 630.6%
24M
8:24/mi
3:10:48
↓ 821.3%
40K· 24.85 mi
8:40/mi
3:18:13
↓ 200.3%
25.2M
9:23/mi
3:21:27
↑ 13↓ 160.2%
Finish· 26.22 mi
7:48/mi
3:29:24
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:37:32
Pace7:26 /mi
2nd Half
Distance13.11 mi
Time1:51:52
Pace8:32 /mi
📊Positive Split: 14.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:13:3423:167:2923:16
7:29
-
10K
6.21 mi11:36:2646:087:2522:52
7:22
-0:07
15K
9.32 mi11:59:231:09:057:2522:57
7:23
+0:01
20K
12.43 mi12:22:431:32:257:2623:20
7:31
+0:08
Half
13.11 mi12:27:501:37:327:265:07
7:30
-0:01
25K
15.53 mi12:46:471:56:297:3018:57
7:49
+0:19
30K
18.64 mi13:12:262:22:087:3725:39
8:15
+0:26
20M
20.00 mi13:24:162:33:587:4211:50
8:42
+0:27
21M
21.00 mi13:33:072:42:497:458:51
8:51
+0:09
35K
21.75 mi13:39:182:49:007:466:11
8:16
-0:35
23M
23.00 mi13:52:423:02:247:5613:24
10:42
+2:26
24M
24.00 mi14:01:063:10:487:578:24
8:24
-2:18
40K
24.85 mi14:08:313:18:137:587:25
8:40
+0:16
25.2M
25.20 mi14:11:453:21:278:003:14
9:23
+0:43
Finish
26.22 mi14:19:423:29:248:007:57
7:48
-1:35

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

7:22 /mi

Average Pace

8:00 /mi

Slowest Pace

10:42 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:45:29

50% of race

Time at Steady Pace

1:06:36

32% of race

Time at Slower Pace

37:19

18% of race

Average Pace: 7:59 /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 mi11:13:3423:167:2923:16
7:29
#12160
10K
6.21 mi11:36:2646:087:2522:52
7:22
#11470
15K
9.32 mi11:59:231:09:057:2522:57
7:23
#11180
20K
12.43 mi12:22:431:32:257:2623:20
7:31
#11089
Half
13.11 mi12:27:501:37:327:265:07
7:30
#11140
25K
15.53 mi12:46:471:56:297:3018:57
7:49
#11321
30K
18.64 mi13:12:262:22:087:3725:39
8:15
#11643
20M
20.00 mi13:24:162:33:587:4211:50
8:42
#11898
21M
21.00 mi13:33:072:42:497:458:51
8:51
#11910
35K
21.75 mi13:39:182:49:007:466:11
8:16
#11989
23M
23.00 mi13:52:423:02:247:5613:24
10:42
#13013
24M
24.00 mi14:01:063:10:487:578:24
8:24
#13036
40K
24.85 mi14:08:313:18:137:587:25
8:40
#13083
25.2M
25.20 mi14:11:453:21:278:003:14
9:23
#13090
Finish
26.22 mi14:19:423:29:248:007:57
7:48
#13049
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi121602884288410772(Top 38%)2259(Top 18%)2259(Top 41%)
10K6.21 mi3.10 mi11470+6902540+3442540+34410848(Top 38%)2228(Top 18%)2228(Top 41%)
15K9.32 mi3.11 mi11180+2902404+1362404+13610772(Top 38%)2259(Top 18%)2259(Top 41%)
20K12.43 mi3.11 mi11089+912391+132391+1310869(Top 38%)2408(Top 20%)2408(Top 44%)
Half13.11 mi0.68 mi11140-512426-352426-3511802(Top 42%)2841(Top 23%)2841(Top 52%)
25K15.53 mi2.42 mi11321-1812549-1232549-12312508(Top 44%)3403(Top 28%)3403(Top 62%)
30K18.64 mi3.11 mi11643-3222806-2572806-25713206(Top 46%)3944(Top 32%)3944(Top 72%)
20M20.00 mi1.36 mi11898-2552976-1702976-17015121(Top 53%)5101(Top 42%)5101(Top 93%)
21M21.00 mi1.00 mi11910-123026-503026-5012630(Top 44%)3940(Top 32%)3940(Top 72%)
35K21.75 mi0.75 mi11989-793091-653091-6514051(Top 49%)4687(Top 38%)4687(Top 86%)
23M23.00 mi1.25 mi13013-10243674-5833674-58322527(Top 79%)9355(Top 77%)9355(Top 171%)
24M24.00 mi1.00 mi13036-233724-503724-5013887(Top 49%)4754(Top 39%)4754(Top 87%)
40K24.85 mi0.85 mi13083-473777-533777-5314477(Top 51%)5222(Top 43%)5222(Top 95%)
25.2M25.20 mi0.35 mi13090-73791-143791-1413910(Top 49%)4953(Top 41%)4953(Top 91%)
Finish26.22 mi1.02 mi13049+413786+53786+511480(Top 40%)3697(Top 30%)3697(Top 68%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 38%
×21story building
+97ft-345ft

Overall

10772

Females

2259

F18-39

2259

5K→10K

3.1 - 6.2 mi

Top 38%
×5story building
+79ft-138ft

Overall

10848

Females

2228

F18-39

2228

10K→15K

6.2 - 9.3 mi

Top 38%
×3story building
+67ft-78ft

Overall

10772

Females

2259

F18-39

2259

15K→20K

9.3 - 12.4 mi

Top 38%
×5story building
+106ft-86ft

Overall

10869

Females

2408

F18-39

2408

20K→Half

12.4 - 13.1 mi

Top 42%
×2story building
+19ft-37ft

Overall

11802

Females

2841

F18-39

2841

Half→25K

13.1 - 15.5 mi

Top 44%
×4story building
+66ft-88ft

Overall

12508

Females

3403

F18-39

3403

25K→30K

15.5 - 18.6 mi

Top 46%
×9story building
+181ft-148ft

Overall

13206

Females

3944

F18-39

3944

30K→20M

18.6 - 20.0 mi

Top 53%
×5story building
+64ft-50ft

Overall

15121

Females

5101

F18-39

5101

20M→21M

20.0 - 21.0 mi

Top 44%
×8story building
+106ft-24ft

Overall

12630

Females

3940

F18-39

3940

21M→35K

21.0 - 21.8 mi

Top 49%
×7story building
+17ft-86ft

Overall

14051

Females

4687

F18-39

4687

35K→23M

21.8 - 23.0 mi

Top 79%
×5story building
+23ft-63ft

Overall

22527

Females

9355

F18-39

9355

23M→24M

23.0 - 24.0 mi

Top 49%
×6story building
+12ft-82ft

Overall

13887

Females

4754

F18-39

4754

24M→40K

24.0 - 24.9 mi

Top 51%
×1story
+6ft-20ft

Overall

14477

Females

5222

F18-39

5222

40K→25.2M

24.9 - 25.2 mi

Top 49%
×1story
+13ft-16ft

Overall

13910

Females

4953

F18-39

4953

25.2M→Finish

25.2 - 26.2 mi

Top 40%
×2story building
+22ft-21ft

Overall

11480

Females

3697

F18-39

3697

Passing Analysis

Category:
Athletes Passed
2032
Passed By
2921
Net Change
-889
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#12160
5K → 10K74656+690#12160#11470
10K → 15K35262+290#11470#11180
15K → 20K215124+91#11180#11089
20K → Half1667-51#11089#11140
Half → 25K120301-181#11140#11321
25K → 30K137459-322#11321#11643
30K → 20M64319-255#11643#11898
20M → 21M98110-12#11898#11910
21M → 35K39118-79#11910#11989
35K → 23M161040-1024#11989#13013
23M → 24M6790-23#13013#13036
24M → 40K59106-47#13036#13083
40K → 25.2M2633-7#13083#13090
25.2M → Finish7736+41#13090#13049
TOTALS20322921-889
📊

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