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BOSTON MARATHON 2025

Katrina Stephens

Bib: 21455•F

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Female)
#0 / 12228
Top 42%
Masters (Masters Women)
#0 / 6759
Top 29%
Division (F45-49)
#0 / 1813
Top 35%
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
8:11/mi
25:27
↑ 97↓ 3451.5%
10K· 6.21 mi
8:15/mi
51:05
↑ 79↓ 1380.4%
15K· 9.32 mi
8:15/mi
1:16:42
↑ 67↓ 78
20K· 12.43 mi
8:17/mi
1:42:27
↑ 106↓ 860.1%
Half· 13.11 mi
8:04/mi
1:47:57
↑ 19↓ 370.5%
25K· 15.53 mi
8:17/mi
2:08:03
↑ 66↓ 880.2%
30K· 18.64 mi
8:30/mi
2:34:29
↑ 181↓ 1480.2%
20M
8:28/mi
2:46:00
↑ 64↓ 500.2%
21M
9:08/mi
2:55:08
↑ 106↓ 241.6%
35K· 21.75 mi
8:16/mi
3:01:19
↑ 17↓ 861.7%
23M
8:32/mi
3:12:00
↑ 23↓ 630.6%
24M
8:15/mi
3:20:15
↓ 821.3%
40K· 24.85 mi
8:22/mi
3:27:24
↓ 200.3%
25.2M
9:08/mi
3:30:33
↑ 13↓ 160.2%
Finish· 26.22 mi
8:00/mi
3:38:42
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:47:57
Pace8:14 /mi
2nd Half
Distance13.11 mi
Time1:50:45
Pace8:27 /mi
📊Positive Split: 2.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:21:3325:278:1125:27
8:11
-
10K
6.21 mi11:47:1151:058:1325:38
8:15
+0:04
15K
9.32 mi12:12:481:16:428:1425:37
8:15
0:00
20K
12.43 mi12:38:331:42:278:1525:45
8:17
+0:02
Half
13.11 mi12:44:031:47:578:145:30
8:04
-0:13
25K
15.53 mi13:04:092:08:038:1520:06
8:17
+0:13
30K
18.64 mi13:30:352:34:298:1726:26
8:30
+0:13
20M
20.00 mi13:42:062:46:008:1811:31
8:28
-0:02
21M
21.00 mi13:51:142:55:088:209:08
9:08
+0:40
35K
21.75 mi13:57:253:01:198:206:11
8:16
-0:52
23M
23.00 mi14:08:063:12:008:2110:41
8:32
+0:16
24M
24.00 mi14:16:213:20:158:218:15
8:15
-0:17
40K
24.85 mi14:23:303:27:248:217:09
8:22
+0:07
25.2M
25.20 mi14:26:393:30:338:213:09
9:08
+0:46
Finish
26.22 mi14:34:483:38:428:218:09
8:00
-1:08

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

8:00 /mi

Average Pace

8:21 /mi

Slowest Pace

9:08 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:26:25

94% of race

Time at Steady Pace

12:17

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:20 /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 mi11:21:3325:278:1125:27
8:11
#18048
10K
6.21 mi11:47:1151:058:1325:38
8:15
#18113
15K
9.32 mi12:12:481:16:428:1425:37
8:15
#17955
20K
12.43 mi12:38:331:42:278:1525:45
8:17
#17641
Half
13.11 mi12:44:031:47:578:145:30
8:04
#17573
25K
15.53 mi13:04:092:08:038:1520:06
8:17
#17235
30K
18.64 mi13:30:352:34:298:1726:26
8:30
#16754
20M
20.00 mi13:42:062:46:008:1811:31
8:28
#16512
21M
21.00 mi13:51:142:55:088:209:08
9:08
#16329
35K
21.75 mi13:57:253:01:198:206:11
8:16
#16216
23M
23.00 mi14:08:063:12:008:2110:41
8:32
#16000
24M
24.00 mi14:16:213:20:158:218:15
8:15
#15859
40K
24.85 mi14:23:303:27:248:217:09
8:22
#15706
25.2M
25.20 mi14:26:393:30:338:213:09
9:08
#15653
Finish
26.22 mi14:34:483:38:428:218:09
8:00
#15534
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF45-49Seg. OverallSeg. FemalesSeg. F45-49
5K3.11 mi3.11 mi180486372637217699(Top 62%)6137(Top 50%)6137(Top 338%)
10K6.21 mi3.10 mi18113-656398-266398-2618227(Top 64%)6437(Top 53%)6437(Top 355%)
15K9.32 mi3.11 mi17955+1586299+996299+9917699(Top 62%)6137(Top 50%)6137(Top 338%)
20K12.43 mi3.11 mi17641+3146122+1776122+17716868(Top 59%)5700(Top 47%)5700(Top 314%)
Half13.11 mi0.68 mi17573+686076+466076+4616410(Top 58%)5415(Top 44%)5415(Top 299%)
25K15.53 mi2.42 mi17235+3385901+1755901+17515864(Top 56%)5235(Top 43%)5235(Top 289%)
30K18.64 mi3.11 mi16754+4815670+2315670+23114816(Top 52%)4807(Top 39%)4807(Top 265%)
20M20.00 mi1.36 mi16512+2425562+1085562+10813660(Top 48%)4333(Top 35%)4333(Top 239%)
21M21.00 mi1.00 mi16329+1835483+795483+7914296(Top 50%)4789(Top 39%)4789(Top 264%)
35K21.75 mi0.75 mi16216+1135440+435440+4314089(Top 50%)4725(Top 39%)4725(Top 261%)
23M23.00 mi1.25 mi16000+2165365+755365+7513548(Top 48%)4554(Top 37%)4554(Top 251%)
24M24.00 mi1.00 mi15859+1415297+685297+6812958(Top 46%)4308(Top 35%)4308(Top 238%)
40K24.85 mi0.85 mi15706+1535231+665231+6612589(Top 44%)4242(Top 35%)4242(Top 234%)
25.2M25.20 mi0.35 mi15653+535223+85223+812651(Top 45%)4330(Top 35%)4330(Top 239%)
Finish26.22 mi1.02 mi15534+1195173+505173+5012906(Top 45%)4389(Top 36%)4389(Top 242%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 62%
×21story building
+97ft-345ft

Overall

17699

Females

6137

F45-49

6137

5K→10K

3.1 - 6.2 mi

Top 64%
×5story building
+79ft-138ft

Overall

18227

Females

6437

F45-49

6437

10K→15K

6.2 - 9.3 mi

Top 62%
×3story building
+67ft-78ft

Overall

17699

Females

6137

F45-49

6137

15K→20K

9.3 - 12.4 mi

Top 59%
×5story building
+106ft-86ft

Overall

16868

Females

5700

F45-49

5700

20K→Half

12.4 - 13.1 mi

Top 58%
×2story building
+19ft-37ft

Overall

16410

Females

5415

F45-49

5415

Half→25K

13.1 - 15.5 mi

Top 56%
×4story building
+66ft-88ft

Overall

15864

Females

5235

F45-49

5235

25K→30K

15.5 - 18.6 mi

Top 52%
×9story building
+181ft-148ft

Overall

14816

Females

4807

F45-49

4807

30K→20M

18.6 - 20.0 mi

Top 48%
×5story building
+64ft-50ft

Overall

13660

Females

4333

F45-49

4333

20M→21M

20.0 - 21.0 mi

Top 50%
×8story building
+106ft-24ft

Overall

14296

Females

4789

F45-49

4789

21M→35K

21.0 - 21.8 mi

Top 50%
×7story building
+17ft-86ft

Overall

14089

Females

4725

F45-49

4725

35K→23M

21.8 - 23.0 mi

Top 48%
×5story building
+23ft-63ft

Overall

13548

Females

4554

F45-49

4554

23M→24M

23.0 - 24.0 mi

Top 46%
×6story building
+12ft-82ft

Overall

12958

Females

4308

F45-49

4308

24M→40K

24.0 - 24.9 mi

Top 44%
×1story
+6ft-20ft

Overall

12589

Females

4242

F45-49

4242

40K→25.2M

24.9 - 25.2 mi

Top 45%
×1story
+13ft-16ft

Overall

12651

Females

4330

F45-49

4330

25.2M→Finish

25.2 - 26.2 mi

Top 45%
×2story building
+22ft-21ft

Overall

12906

Females

4389

F45-49

4389

Passing Analysis

Category:
Athletes Passed
3166
Passed By
652
Net Change
+2514
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#18048
5K → 10K255320-65#18048#18113
10K → 15K265107+158#18113#17955
15K → 20K37561+314#17955#17641
20K → Half8214+68#17641#17573
Half → 25K35820+338#17573#17235
25K → 30K50827+481#17235#16754
30K → 20M2508+242#16754#16512
20M → 21M21330+183#16512#16329
21M → 35K1218+113#16329#16216
35K → 23M22913+216#16216#16000
23M → 24M15615+141#16000#15859
24M → 40K1596+153#15859#15706
40K → 25.2M618+53#15706#15653
25.2M → Finish13415+119#15653#15534
TOTALS3166652+2514
📊

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