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BOSTON MARATHON 2025

Stephanie Armstrong

Bib: 19993•F

CO

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
8:09/mi
25:20
↑ 97↓ 3451.5%
10K· 6.21 mi
9:13/mi
53:58
↑ 79↓ 1380.4%
15K· 9.32 mi
10:01/mi
1:25:04
↑ 67↓ 78
20K· 12.43 mi
10:23/mi
1:57:20
↑ 106↓ 860.1%
Half· 13.11 mi
9:51/mi
2:04:03
↑ 19↓ 370.5%
25K· 15.53 mi
10:34/mi
2:29:41
↑ 66↓ 880.2%
30K· 18.64 mi
11:31/mi
3:05:29
↑ 181↓ 1480.2%
20M
11:38/mi
3:21:18
↑ 64↓ 500.2%
21M
12:21/mi
3:33:39
↑ 106↓ 241.6%
35K· 21.75 mi
10:30/mi
3:41:30
↑ 17↓ 861.7%
23M
11:13/mi
3:55:33
↑ 23↓ 630.6%
24M
10:03/mi
4:05:36
↓ 821.3%
40K· 24.85 mi
11:46/mi
4:15:40
↓ 200.3%
25.2M
12:19/mi
4:19:55
↑ 13↓ 160.2%
Finish· 26.22 mi
9:47/mi
4:29:53
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:04:03
Pace9:28 /mi
2nd Half
Distance13.11 mi
Time2:25:50
Pace11:07 /mi
📊Positive Split: 17.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:17:4425:208:0925:20
8:09
-
10K
6.21 mi11:46:2253:588:4128:38
9:13
+1:04
15K
9.32 mi12:17:281:25:049:0831:06
10:01
+0:48
20K
12.43 mi12:49:441:57:209:2632:16
10:23
+0:22
Half
13.11 mi12:56:272:04:039:286:43
9:51
-0:32
25K
15.53 mi13:22:052:29:419:3825:38
10:34
+0:43
30K
18.64 mi13:57:533:05:299:5735:48
11:31
+0:57
20M
20.00 mi14:13:423:21:1810:0415:49
11:38
+0:07
21M
21.00 mi14:26:033:33:3910:1012:21
12:21
+0:43
35K
21.75 mi14:33:543:41:3010:117:51
10:30
-1:51
23M
23.00 mi14:47:573:55:3310:1414:03
11:13
+0:43
24M
24.00 mi14:58:004:05:3610:1410:03
10:03
-1:10
40K
24.85 mi15:08:044:15:4010:1710:04
11:46
+1:43
25.2M
25.20 mi15:12:194:19:5510:194:15
12:19
+0:33
Finish
26.22 mi15:22:174:29:5310:189:58
9:47
-2:32

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

8:09 /mi

Average Pace

10:18 /mi

Slowest Pace

12:21 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:10:39

26% of race

Time at Steady Pace

1:46:54

40% of race

Time at Slower Pace

1:32:20

34% of race

Average Pace: 10:18 /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 mi11:17:4425:208:0925:20
8:09
#17804
10K
6.21 mi11:46:2253:588:4128:38
9:13
#20852
15K
9.32 mi12:17:281:25:049:0831:06
10:01
#22822
20K
12.43 mi12:49:441:57:209:2632:16
10:23
#23598
Half
13.11 mi12:56:272:04:039:286:43
9:51
#23640
25K
15.53 mi13:22:052:29:419:3825:38
10:34
#23797
30K
18.64 mi13:57:533:05:299:5735:48
11:31
#24105
20M
20.00 mi14:13:423:21:1810:0415:49
11:38
#24164
21M
21.00 mi14:26:033:33:3910:1012:21
12:21
#24170
35K
21.75 mi14:33:543:41:3010:117:51
10:30
#24130
23M
23.00 mi14:47:573:55:3310:1414:03
11:13
#24103
24M
24.00 mi14:58:004:05:3610:1410:03
10:03
#24001
40K
24.85 mi15:08:044:15:4010:1710:04
11:46
#24052
25.2M
25.20 mi15:12:194:19:5510:194:15
12:19
#24058
Finish
26.22 mi15:22:174:29:5310:189:58
9:47
#24003
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF40-44Seg. OverallSeg. FemalesSeg. F40-44
5K3.11 mi3.11 mi178046225622525011(Top 88%)10216(Top 84%)10216(Top 595%)
10K6.21 mi3.10 mi20852-30487969-17447969-174423268(Top 82%)9279(Top 76%)9279(Top 540%)
15K9.32 mi3.11 mi22822-19709023-10549023-105425011(Top 88%)10216(Top 84%)10216(Top 595%)
20K12.43 mi3.11 mi23598-7769462-4399462-43924995(Top 88%)10254(Top 84%)10254(Top 597%)
Half13.11 mi0.68 mi23640-429486-249486-2424509(Top 86%)10003(Top 82%)10003(Top 582%)
25K15.53 mi2.42 mi23797-1579583-979583-9724506(Top 86%)10018(Top 82%)10018(Top 583%)
30K18.64 mi3.11 mi24105-3089783-2009783-20024879(Top 88%)10341(Top 85%)10341(Top 602%)
20M20.00 mi1.36 mi24164-599844-619844-6124779(Top 87%)10351(Top 85%)10351(Top 603%)
21M21.00 mi1.00 mi24170-69856-129856-1224185(Top 85%)10128(Top 83%)10128(Top 590%)
35K21.75 mi0.75 mi24130+409839+179839+1723166(Top 82%)9638(Top 79%)9638(Top 561%)
23M23.00 mi1.25 mi24103+279849-109849-1023725(Top 84%)9971(Top 82%)9971(Top 580%)
24M24.00 mi1.00 mi24001+1029807+429807+4221516(Top 76%)8868(Top 73%)8868(Top 516%)
40K24.85 mi0.85 mi24052-519853-469853-4624604(Top 87%)10476(Top 86%)10476(Top 610%)
25.2M25.20 mi0.35 mi24058-69862-99862-923888(Top 84%)10113(Top 83%)10113(Top 589%)
Finish26.22 mi1.02 mi24003+559843+199843+1922231(Top 78%)9286(Top 76%)9286(Top 541%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 88%
×21story building
+97ft-345ft

Overall

25011

Females

10216

F40-44

10216

5K→10K

3.1 - 6.2 mi

Top 82%
×5story building
+79ft-138ft

Overall

23268

Females

9279

F40-44

9279

10K→15K

6.2 - 9.3 mi

Top 88%
×3story building
+67ft-78ft

Overall

25011

Females

10216

F40-44

10216

15K→20K

9.3 - 12.4 mi

Top 88%
×5story building
+106ft-86ft

Overall

24995

Females

10254

F40-44

10254

20K→Half

12.4 - 13.1 mi

Top 86%
×2story building
+19ft-37ft

Overall

24509

Females

10003

F40-44

10003

Half→25K

13.1 - 15.5 mi

Top 86%
×4story building
+66ft-88ft

Overall

24506

Females

10018

F40-44

10018

25K→30K

15.5 - 18.6 mi

Top 88%
×9story building
+181ft-148ft

Overall

24879

Females

10341

F40-44

10341

30K→20M

18.6 - 20.0 mi

Top 87%
×5story building
+64ft-50ft

Overall

24779

Females

10351

F40-44

10351

20M→21M

20.0 - 21.0 mi

Top 85%
×8story building
+106ft-24ft

Overall

24185

Females

10128

F40-44

10128

21M→35K

21.0 - 21.8 mi

Top 82%
×7story building
+17ft-86ft

Overall

23166

Females

9638

F40-44

9638

35K→23M

21.8 - 23.0 mi

Top 84%
×5story building
+23ft-63ft

Overall

23725

Females

9971

F40-44

9971

23M→24M

23.0 - 24.0 mi

Top 76%
×6story building
+12ft-82ft

Overall

21516

Females

8868

F40-44

8868

24M→40K

24.0 - 24.9 mi

Top 87%
×1story
+6ft-20ft

Overall

24604

Females

10476

F40-44

10476

40K→25.2M

24.9 - 25.2 mi

Top 84%
×1story
+13ft-16ft

Overall

23888

Females

10113

F40-44

10113

25.2M→Finish

25.2 - 26.2 mi

Top 78%
×2story building
+22ft-21ft

Overall

22231

Females

9286

F40-44

9286

Passing Analysis

Category:
Athletes Passed
674
Passed By
6873
Net Change
-6199
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#17804
5K → 10K43052-3048#17804#20852
10K → 15K161986-1970#20852#22822
15K → 20K34810-776#22822#23598
20K → Half850-42#23598#23640
Half → 25K72229-157#23640#23797
25K → 30K66374-308#23797#24105
30K → 20M68127-59#24105#24164
20M → 21M5359-6#24164#24170
21M → 35K5212+40#24170#24130
35K → 23M8558+27#24130#24103
23M → 24M1064+102#24103#24001
24M → 40K2475-51#24001#24052
40K → 25.2M1521-6#24052#24058
25.2M → Finish7116+55#24058#24003
TOTALS6746873-6199
📊

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