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BOSTON MARATHON 2025

Katherine Forsyth

Bib: 16222•F

MI

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 26%
Gender (Female)
#0 / 12228
Top 9%
Division (F18-39)
#0 / 5469
Top 17%
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
7:47/mi
24:12
↑ 97↓ 3451.5%
10K· 6.21 mi
7:36/mi
47:49
↑ 79↓ 1380.4%
15K· 9.32 mi
7:32/mi
1:11:13
↑ 67↓ 78
20K· 12.43 mi
7:23/mi
1:34:10
↑ 106↓ 860.1%
Half· 13.11 mi
7:17/mi
1:39:08
↑ 19↓ 370.5%
25K· 15.53 mi
7:17/mi
1:56:47
↑ 66↓ 880.2%
30K· 18.64 mi
7:26/mi
2:19:54
↑ 181↓ 1480.2%
20M
7:12/mi
2:29:41
↑ 64↓ 500.2%
21M
7:17/mi
2:36:58
↑ 106↓ 241.6%
35K· 21.75 mi
6:22/mi
2:41:44
↑ 17↓ 861.7%
23M
6:51/mi
2:50:18
↑ 23↓ 630.6%
24M
6:35/mi
2:56:53
↓ 821.3%
40K· 24.85 mi
6:29/mi
3:02:26
↓ 200.3%
25.2M
6:58/mi
3:04:50
↑ 13↓ 160.2%
Finish· 26.22 mi
6:15/mi
3:11:12
↑ 22↓ 21

The Course

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Half Splits

1st Half· via Half
Distance13.11 mi
Time1:39:08
Pace7:34 /mi
2nd Half✓ Faster
Distance13.11 mi
Time1:32:04
Pace7:01 /mi
📊Negative Split: 7.1% faster second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:58:4224:127:4724:12
7:47
-
10K
6.21 mi11:22:1947:497:4223:37
7:36
-0:11
15K
9.32 mi11:45:431:11:137:3823:24
7:32
-0:04
20K
12.43 mi12:08:401:34:107:3522:57
7:23
-0:09
Half
13.11 mi12:13:381:39:087:344:58
7:17
-0:06
25K
15.53 mi12:31:171:56:477:3117:39
7:17
0:00
30K
18.64 mi12:54:242:19:547:3023:07
7:26
+0:09
20M
20.00 mi13:04:112:29:417:299:47
7:12
-0:14
21M
21.00 mi13:11:282:36:587:287:17
7:17
+0:05
35K
21.75 mi13:16:142:41:447:264:46
6:22
-0:55
23M
23.00 mi13:24:482:50:187:248:34
6:51
+0:29
24M
24.00 mi13:31:232:56:537:226:35
6:35
-0:16
40K
24.85 mi13:36:563:02:267:205:33
6:29
-0:06
25.2M
25.20 mi13:39:203:04:507:202:24
6:58
+0:29
Finish
26.22 mi13:45:423:11:127:186:22
6:15
-0:43

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

6:15 /mi

Average Pace

7:18 /mi

Slowest Pace

7:47 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

34:14

18% of race

Time at Steady Pace

1:25:45

45% of race

Time at Slower Pace

1:11:13

37% of race

Average Pace: 7:18 /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 mi10:58:4224:127:4724:12
7:47
#14713
10K
6.21 mi11:22:1947:497:4223:37
7:36
#13884
15K
9.32 mi11:45:431:11:137:3823:24
7:32
#13235
20K
12.43 mi12:08:401:34:107:3522:57
7:23
#12297
Half
13.11 mi12:13:381:39:087:344:58
7:17
#12174
25K
15.53 mi12:31:171:56:477:3117:39
7:17
#11483
30K
18.64 mi12:54:242:19:547:3023:07
7:26
#10635
20M
20.00 mi13:04:112:29:417:299:47
7:12
#10096
21M
21.00 mi13:11:282:36:587:287:17
7:17
#9597
35K
21.75 mi13:16:142:41:447:264:46
6:22
#9211
23M
23.00 mi13:24:482:50:187:248:34
6:51
#8688
24M
24.00 mi13:31:232:56:537:226:35
6:35
#8259
40K
24.85 mi13:36:563:02:267:205:33
6:29
#7897
25.2M
25.20 mi13:39:203:04:507:202:24
6:58
#7721
Finish
26.22 mi13:45:423:11:127:186:22
6:15
#7377
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi147134350435012050(Top 42%)2926(Top 24%)2926(Top 54%)
10K6.21 mi3.10 mi13884+8293870+4803870+48013038(Top 46%)3384(Top 28%)3384(Top 62%)
15K9.32 mi3.11 mi13235+6493532+3383532+33812050(Top 42%)2926(Top 24%)2926(Top 54%)
20K12.43 mi3.11 mi12297+9383028+5043028+5049792(Top 34%)1863(Top 15%)1863(Top 34%)
Half13.11 mi0.68 mi12174+1232974+542974+549834(Top 35%)1850(Top 15%)1850(Top 34%)
25K15.53 mi2.42 mi11483+6912639+3352639+3358217(Top 29%)1297(Top 11%)1297(Top 24%)
30K18.64 mi3.11 mi10635+8482273+3662273+3667319(Top 26%)1134(Top 9%)1134(Top 21%)
20M20.00 mi1.36 mi10096+5392033+2402033+2405222(Top 18%)570(Top 5%)570(Top 10%)
21M21.00 mi1.00 mi9597+4991837+1961837+1963583(Top 13%)299(Top 2%)299(Top 5%)
35K21.75 mi0.75 mi9211+3861696+1411696+1411952(Top 7%)118(Top 1.0%)118(Top 2%)
23M23.00 mi1.25 mi8688+5231506+1901506+1902951(Top 10%)249(Top 2%)249(Top 5%)
24M24.00 mi1.00 mi8259+4291372+1341372+1342454(Top 9%)184(Top 2%)184(Top 3%)
40K24.85 mi0.85 mi7897+3621267+1051267+1051605(Top 6%)115(Top 0.9%)115(Top 2%)
25.2M25.20 mi0.35 mi7721+1761222+451222+451427(Top 5%)117(Top 1.0%)117(Top 2%)
Finish26.22 mi1.02 mi7377+3441123+991123+991721(Top 6%)121(Top 1.0%)121(Top 2%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 42%
×21story building
+97ft-345ft

Overall

12050

Females

2926

F18-39

2926

5K→10K

3.1 - 6.2 mi

Top 46%
×5story building
+79ft-138ft

Overall

13038

Females

3384

F18-39

3384

10K→15K

6.2 - 9.3 mi

Top 42%
×3story building
+67ft-78ft

Overall

12050

Females

2926

F18-39

2926

15K→20K

9.3 - 12.4 mi

Top 34%
×5story building
+106ft-86ft

Overall

9792

Females

1863

F18-39

1863

20K→Half

12.4 - 13.1 mi

Top 35%
×2story building
+19ft-37ft

Overall

9834

Females

1850

F18-39

1850

Half→25K

13.1 - 15.5 mi

Top 29%
×4story building
+66ft-88ft

Overall

8217

Females

1297

F18-39

1297

25K→30K

15.5 - 18.6 mi

Top 26%
×9story building
+181ft-148ft

Overall

7319

Females

1134

F18-39

1134

30K→20M

18.6 - 20.0 mi

Top 18%
×5story building
+64ft-50ft

Overall

5222

Females

570

F18-39

570

20M→21M

20.0 - 21.0 mi

Top 13%
×8story building
+106ft-24ft

Overall

3583

Females

299

F18-39

299

21M→35K

21.0 - 21.8 mi

Top 7%
×7story building
+17ft-86ft

Overall

1952

Females

118

F18-39

118

35K→23M

21.8 - 23.0 mi

Top 10%
×5story building
+23ft-63ft

Overall

2951

Females

249

F18-39

249

23M→24M

23.0 - 24.0 mi

Top 9%
×6story building
+12ft-82ft

Overall

2454

Females

184

F18-39

184

24M→40K

24.0 - 24.9 mi

Top 6%
×1story
+6ft-20ft

Overall

1605

Females

115

F18-39

115

40K→25.2M

24.9 - 25.2 mi

Top 5%
×1story
+13ft-16ft

Overall

1427

Females

117

F18-39

117

25.2M→Finish

25.2 - 26.2 mi

Top 6%
×2story building
+22ft-21ft

Overall

1721

Females

121

F18-39

121

Passing Analysis

Category:
Athletes Passed
7409*
Passed By
73
Net Change
+7336
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#14713
5K → 10K87950+829#14713#13884
10K → 15K66516+649#13884#13235
15K → 20K9391+938#13235#12297
20K → Half1252+123#12297#12174
Half → 25K6910+691#12174#11483
25K → 30K8524+848#11483#10635
30K → 20M5390+539#10635#10096
20M → 21M499*0+499#10096#9597
21M → 35K3860+386#9597#9211
35K → 23M5230+523#9211#8688
23M → 24M4290+429#8688#8259
24M → 40K3620+362#8259#7897
40K → 25.2M1760+176#7897#7721
25.2M → Finish3440+344#7721#7377
TOTALS7409*73+7336

* Includes athletes who did not complete a segment (DNF/DNQ).

📊

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