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BOSTON MARATHON 2025

Tracy Zwick

Bib: 23753•F

NY

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Female)
#0 / 12228
Masters (Masters Women)
#0 / 6759
Division (F50-54)
#0 / 1303
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
8:35/mi
26:41
↑ 97↓ 3451.5%
10K· 6.21 mi
8:55/mi
54:23
↑ 79↓ 1380.4%
15K· 9.32 mi
9:04/mi
1:22:32
↑ 67↓ 78
20K· 12.43 mi
9:12/mi
1:51:08
↑ 106↓ 860.1%
Half· 13.11 mi
9:01/mi
1:57:17
↑ 19↓ 370.5%
25K· 15.53 mi
9:25/mi
2:20:07
↑ 66↓ 880.2%
30K· 18.64 mi
9:53/mi
2:50:49
↑ 181↓ 1480.2%
20M
10:03/mi
3:04:29
↑ 64↓ 500.2%
21M
10:26/mi
3:14:55
↑ 106↓ 241.6%
35K· 21.75 mi
9:13/mi
3:21:49
↑ 17↓ 861.7%
23M
9:29/mi
3:33:42
↑ 23↓ 630.6%
24M
9:26/mi
3:43:08
↓ 821.3%
40K· 24.85 mi
9:33/mi
3:51:18
↓ 200.3%
25.2M
10:21/mi
3:54:52
↑ 13↓ 160.2%
Finish· 26.22 mi
9:11/mi
4:04:14
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:57:17
Pace8:57 /mi
2nd Half
Distance13.11 mi
Time2:06:57
Pace9:41 /mi
📊Positive Split: 8.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:24:4226:418:3526:41
8:35
-
10K
6.21 mi11:52:2454:238:4527:42
8:55
+0:20
15K
9.32 mi12:20:331:22:328:5128:09
9:04
+0:09
20K
12.43 mi12:49:091:51:088:5728:36
9:12
+0:08
Half
13.11 mi12:55:181:57:178:576:09
9:01
-0:11
25K
15.53 mi13:18:082:20:079:0122:50
9:25
+0:24
30K
18.64 mi13:48:502:50:499:1030:42
9:53
+0:28
20M
20.00 mi14:02:303:04:299:1313:40
10:03
+0:10
21M
21.00 mi14:12:563:14:559:1710:26
10:26
+0:23
35K
21.75 mi14:19:503:21:499:176:54
9:13
-1:13
23M
23.00 mi14:31:433:33:429:1711:53
9:29
+0:16
24M
24.00 mi14:41:093:43:089:189:26
9:26
-0:03
40K
24.85 mi14:49:193:51:189:188:10
9:33
+0:07
25.2M
25.20 mi14:52:533:54:529:193:34
10:21
+0:48
Finish
26.22 mi15:02:154:04:149:199:22
9:11
-1:10

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

8:35 /mi

Average Pace

9:19 /mi

Slowest Pace

10:26 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:28:41

36% of race

Time at Steady Pace

1:37:11

40% of race

Time at Slower Pace

58:22

24% of race

Average Pace: 9:19 /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 mi11:24:4226:418:3526:41
8:35
#20406
10K
6.21 mi11:52:2454:238:4527:42
8:55
#21185
15K
9.32 mi12:20:331:22:328:5128:09
9:04
#21559
20K
12.43 mi12:49:091:51:088:5728:36
9:12
#21668
Half
13.11 mi12:55:181:57:178:576:09
9:01
#21674
25K
15.53 mi13:18:082:20:079:0122:50
9:25
#21641
30K
18.64 mi13:48:502:50:499:1030:42
9:53
#21600
20M
20.00 mi14:02:303:04:299:1313:40
10:03
#21563
21M
21.00 mi14:12:563:14:559:1710:26
10:26
#21453
35K
21.75 mi14:19:503:21:499:176:54
9:13
#21373
23M
23.00 mi14:31:433:33:429:1711:53
9:29
#21189
24M
24.00 mi14:41:093:43:089:189:26
9:26
#21108
40K
24.85 mi14:49:193:51:189:188:10
9:33
#21029
25.2M
25.20 mi14:52:533:54:529:193:34
10:21
#20976
Finish
26.22 mi15:02:154:04:149:199:22
9:11
#20927
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF50-54Seg. OverallSeg. FemalesSeg. F50-54
5K3.11 mi3.11 mi204067748774822299(Top 79%)8722(Top 71%)8722(Top 669%)
10K6.21 mi3.10 mi21185-7798156-4088156-40822019(Top 78%)8608(Top 70%)8608(Top 661%)
15K9.32 mi3.11 mi21559-3748336-1808336-18022299(Top 79%)8722(Top 71%)8722(Top 669%)
20K12.43 mi3.11 mi21668-1098420-848420-8421913(Top 77%)8543(Top 70%)8543(Top 656%)
Half13.11 mi0.68 mi21674-68422-28422-221898(Top 77%)8534(Top 70%)8534(Top 655%)
25K15.53 mi2.42 mi21641+338404+188404+1821609(Top 76%)8429(Top 69%)8429(Top 647%)
30K18.64 mi3.11 mi21600+418405-18405-121245(Top 75%)8368(Top 68%)8368(Top 642%)
20M20.00 mi1.36 mi21563+378395+108395+1021153(Top 74%)8443(Top 69%)8443(Top 648%)
21M21.00 mi1.00 mi21453+1108361+348361+3419815(Top 70%)7808(Top 64%)7808(Top 599%)
35K21.75 mi0.75 mi21373+808333+288333+2819303(Top 68%)7612(Top 62%)7612(Top 584%)
23M23.00 mi1.25 mi21189+1848262+718262+7118686(Top 66%)7346(Top 60%)7346(Top 564%)
24M24.00 mi1.00 mi21108+818251+118251+1119402(Top 68%)7776(Top 64%)7776(Top 597%)
40K24.85 mi0.85 mi21029+798221+308221+3018935(Top 67%)7605(Top 62%)7605(Top 584%)
25.2M25.20 mi0.35 mi20976+538198+238198+2318509(Top 65%)7398(Top 61%)7398(Top 568%)
Finish26.22 mi1.02 mi20927+498188+108188+1019928(Top 70%)8109(Top 66%)8109(Top 622%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 79%
×21story building
+97ft-345ft

Overall

22299

Females

8722

F50-54

8722

5K→10K

3.1 - 6.2 mi

Top 78%
×5story building
+79ft-138ft

Overall

22019

Females

8608

F50-54

8608

10K→15K

6.2 - 9.3 mi

Top 79%
×3story building
+67ft-78ft

Overall

22299

Females

8722

F50-54

8722

15K→20K

9.3 - 12.4 mi

Top 77%
×5story building
+106ft-86ft

Overall

21913

Females

8543

F50-54

8543

20K→Half

12.4 - 13.1 mi

Top 77%
×2story building
+19ft-37ft

Overall

21898

Females

8534

F50-54

8534

Half→25K

13.1 - 15.5 mi

Top 76%
×4story building
+66ft-88ft

Overall

21609

Females

8429

F50-54

8429

25K→30K

15.5 - 18.6 mi

Top 75%
×9story building
+181ft-148ft

Overall

21245

Females

8368

F50-54

8368

30K→20M

18.6 - 20.0 mi

Top 74%
×5story building
+64ft-50ft

Overall

21153

Females

8443

F50-54

8443

20M→21M

20.0 - 21.0 mi

Top 70%
×8story building
+106ft-24ft

Overall

19815

Females

7808

F50-54

7808

21M→35K

21.0 - 21.8 mi

Top 68%
×7story building
+17ft-86ft

Overall

19303

Females

7612

F50-54

7612

35K→23M

21.8 - 23.0 mi

Top 66%
×5story building
+23ft-63ft

Overall

18686

Females

7346

F50-54

7346

23M→24M

23.0 - 24.0 mi

Top 68%
×6story building
+12ft-82ft

Overall

19402

Females

7776

F50-54

7776

24M→40K

24.0 - 24.9 mi

Top 67%
×1story
+6ft-20ft

Overall

18935

Females

7605

F50-54

7605

40K→25.2M

24.9 - 25.2 mi

Top 65%
×1story
+13ft-16ft

Overall

18509

Females

7398

F50-54

7398

25.2M→Finish

25.2 - 26.2 mi

Top 70%
×2story building
+22ft-21ft

Overall

19928

Females

8109

F50-54

8109

Passing Analysis

Category:
Athletes Passed
1597
Passed By
2118
Net Change
-521
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#20406
5K → 10K59838-779#20406#21185
10K → 15K102476-374#21185#21559
15K → 20K160269-109#21559#21668
20K → Half3238-6#21668#21674
Half → 25K160127+33#21674#21641
25K → 30K221180+41#21641#21600
30K → 20M11073+37#21600#21563
20M → 21M13929+110#21563#21453
21M → 35K9414+80#21453#21373
35K → 23M19915+184#21373#21189
23M → 24M10322+81#21189#21108
24M → 40K9213+79#21108#21029
40K → 25.2M585+53#21029#20976
25.2M → Finish6819+49#20976#20927
TOTALS15972118-521
📊

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