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BOSTON MARATHON 2025

Tiffany Ma

Bib: 20921•F

DC

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Female)
#0 / 12228
Masters (Masters Women)
#0 / 6759
Division (F40-44)
#0 / 1718
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
8:32/mi
26:30
↑ 97↓ 3451.5%
10K· 6.21 mi
8:38/mi
53:18
↑ 79↓ 1380.4%
15K· 9.32 mi
8:44/mi
1:20:26
↑ 67↓ 78
20K· 12.43 mi
8:54/mi
1:48:04
↑ 106↓ 860.1%
Half· 13.11 mi
8:43/mi
1:54:01
↑ 19↓ 370.5%
25K· 15.53 mi
9:06/mi
2:16:06
↑ 66↓ 880.2%
30K· 18.64 mi
9:15/mi
2:44:49
↑ 181↓ 1480.2%
20M
9:19/mi
2:57:29
↑ 64↓ 500.2%
21M
9:50/mi
3:07:19
↑ 106↓ 241.6%
35K· 21.75 mi
9:23/mi
3:14:20
↑ 17↓ 861.7%
23M
9:23/mi
3:26:05
↑ 23↓ 630.6%
24M
9:14/mi
3:35:19
↓ 821.3%
40K· 24.85 mi
9:16/mi
3:43:14
↓ 200.3%
25.2M
10:00/mi
3:46:41
↑ 13↓ 160.2%
Finish· 26.22 mi
8:51/mi
3:55:42
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:54:01
Pace8:42 /mi
2nd Half
Distance13.11 mi
Time2:01:41
Pace9:17 /mi
📊Positive Split: 6.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:21:2526:308:3226:30
8:32
-
10K
6.21 mi11:48:1353:188:3526:48
8:38
+0:06
15K
9.32 mi12:15:211:20:268:3827:08
8:44
+0:06
20K
12.43 mi12:42:591:48:048:4227:38
8:54
+0:10
Half
13.11 mi12:48:561:54:018:425:57
8:43
-0:11
25K
15.53 mi13:11:012:16:068:4622:05
9:06
+0:23
30K
18.64 mi13:39:442:44:498:5028:43
9:15
+0:09
20M
20.00 mi13:52:242:57:298:5212:40
9:19
+0:04
21M
21.00 mi14:02:143:07:198:559:50
9:50
+0:31
35K
21.75 mi14:09:153:14:208:567:01
9:23
-0:27
23M
23.00 mi14:21:003:26:058:5811:45
9:23
0:00
24M
24.00 mi14:30:143:35:198:589:14
9:14
-0:09
40K
24.85 mi14:38:093:43:148:597:55
9:16
+0:02
25.2M
25.20 mi14:41:363:46:419:003:27
10:00
+0:44
Finish
26.22 mi14:50:373:55:429:009:01
8:51
-1:09

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

8:32 /mi

Average Pace

9:00 /mi

Slowest Pace

10:00 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:42:25

94% of race

Time at Steady Pace

13:17

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:59 /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 mi11:21:2526:308:3226:30
8:32
#20072
10K
6.21 mi11:48:1353:188:3526:48
8:38
#20290
15K
9.32 mi12:15:211:20:268:3827:08
8:44
#20367
20K
12.43 mi12:42:591:48:048:4227:38
8:54
#20398
Half
13.11 mi12:48:561:54:018:425:57
8:43
#20393
25K
15.53 mi13:11:012:16:068:4622:05
9:06
#20417
30K
18.64 mi13:39:442:44:498:5028:43
9:15
#20095
20M
20.00 mi13:52:242:57:298:5212:40
9:19
#19953
21M
21.00 mi14:02:143:07:198:559:50
9:50
#19807
35K
21.75 mi14:09:153:14:208:567:01
9:23
#19808
23M
23.00 mi14:21:003:26:058:5811:45
9:23
#19704
24M
24.00 mi14:30:143:35:198:589:14
9:14
#19655
40K
24.85 mi14:38:093:43:148:597:55
9:16
#19575
25.2M
25.20 mi14:41:363:46:419:003:27
10:00
#19541
Finish
26.22 mi14:50:373:55:429:009:01
8:51
#19495
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF40-44Seg. OverallSeg. FemalesSeg. F40-44
5K3.11 mi3.11 mi200727538753820670(Top 73%)7816(Top 64%)7816(Top 455%)
10K6.21 mi3.10 mi20290-2187644-1067644-10620491(Top 72%)7738(Top 63%)7738(Top 450%)
15K9.32 mi3.11 mi20367-777682-387682-3820670(Top 73%)7816(Top 64%)7816(Top 455%)
20K12.43 mi3.11 mi20398-317701-197701-1920443(Top 72%)7735(Top 63%)7735(Top 450%)
Half13.11 mi0.68 mi20393+57702-17702-120509(Top 72%)7757(Top 63%)7757(Top 452%)
25K15.53 mi2.42 mi20417-247721-197721-1920393(Top 72%)7754(Top 63%)7754(Top 451%)
30K18.64 mi3.11 mi20095+3227580+1417580+14118868(Top 66%)7048(Top 58%)7048(Top 410%)
20M20.00 mi1.36 mi19953+1427519+617519+6118406(Top 65%)6955(Top 57%)6955(Top 405%)
21M21.00 mi1.00 mi19807+1467463+567463+5617649(Top 62%)6620(Top 54%)6620(Top 385%)
35K21.75 mi0.75 mi19808-17479-167479-1619886(Top 70%)7917(Top 65%)7917(Top 461%)
23M23.00 mi1.25 mi19704+1047454+257454+2518188(Top 64%)7078(Top 58%)7078(Top 412%)
24M24.00 mi1.00 mi19655+497454745418527(Top 65%)7311(Top 60%)7311(Top 426%)
40K24.85 mi0.85 mi19575+807424+307424+3017681(Top 62%)6968(Top 57%)6968(Top 406%)
25.2M25.20 mi0.35 mi19541+347421+37421+317142(Top 60%)6680(Top 55%)6680(Top 389%)
Finish26.22 mi1.02 mi19495+467405+167405+1618308(Top 64%)7246(Top 59%)7246(Top 422%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 73%
×21story building
+97ft-345ft

Overall

20670

Females

7816

F40-44

7816

5K→10K

3.1 - 6.2 mi

Top 72%
×5story building
+79ft-138ft

Overall

20491

Females

7738

F40-44

7738

10K→15K

6.2 - 9.3 mi

Top 73%
×3story building
+67ft-78ft

Overall

20670

Females

7816

F40-44

7816

15K→20K

9.3 - 12.4 mi

Top 72%
×5story building
+106ft-86ft

Overall

20443

Females

7735

F40-44

7735

20K→Half

12.4 - 13.1 mi

Top 72%
×2story building
+19ft-37ft

Overall

20509

Females

7757

F40-44

7757

Half→25K

13.1 - 15.5 mi

Top 72%
×4story building
+66ft-88ft

Overall

20393

Females

7754

F40-44

7754

25K→30K

15.5 - 18.6 mi

Top 66%
×9story building
+181ft-148ft

Overall

18868

Females

7048

F40-44

7048

30K→20M

18.6 - 20.0 mi

Top 65%
×5story building
+64ft-50ft

Overall

18406

Females

6955

F40-44

6955

20M→21M

20.0 - 21.0 mi

Top 62%
×8story building
+106ft-24ft

Overall

17649

Females

6620

F40-44

6620

21M→35K

21.0 - 21.8 mi

Top 70%
×7story building
+17ft-86ft

Overall

19886

Females

7917

F40-44

7917

35K→23M

21.8 - 23.0 mi

Top 64%
×5story building
+23ft-63ft

Overall

18188

Females

7078

F40-44

7078

23M→24M

23.0 - 24.0 mi

Top 65%
×6story building
+12ft-82ft

Overall

18527

Females

7311

F40-44

7311

24M→40K

24.0 - 24.9 mi

Top 62%
×1story
+6ft-20ft

Overall

17681

Females

6968

F40-44

6968

40K→25.2M

24.9 - 25.2 mi

Top 60%
×1story
+13ft-16ft

Overall

17142

Females

6680

F40-44

6680

25.2M→Finish

25.2 - 26.2 mi

Top 64%
×2story building
+22ft-21ft

Overall

18308

Females

7246

F40-44

7246

Passing Analysis

Category:
Athletes Passed
1953
Passed By
1376
Net Change
+577
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#20072
5K → 10K178396-218#20072#20290
10K → 15K160237-77#20290#20367
15K → 20K173204-31#20367#20398
20K → Half3429+5#20398#20393
Half → 25K145169-24#20393#20417
25K → 30K40280+322#20417#20095
30K → 20M17836+142#20095#19953
20M → 21M17529+146#19953#19807
21M → 35K4344-1#19807#19808
35K → 23M14844+104#19808#19704
23M → 24M9041+49#19704#19655
24M → 40K9717+80#19655#19575
40K → 25.2M5218+34#19575#19541
25.2M → Finish7832+46#19541#19495
TOTALS19531376+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