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BOSTON MARATHON 2025

Emily Koufos

Bib: 26549•F

MA

0:00
0:00
/ mi
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Overall
#0 / 28404
Gender (Female)
#0 / 12228
Division (F18-39)
#0 / 5469
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
28:25
Rank: #23028
Start → 5K
28:25 | 9:09/mi
10K· 6.21 mi
55:17
Rank: #21939 (+1089)
5K → 10K
26:52 | 8:39/mi
15K· 9.32 mi
1:22:16
Rank: #21409 (+530)
10K → 15K
26:59 | 8:41/mi
20K· 12.43 mi
1:49:13
Rank: #20854 (+555)
15K → 20K
26:57 | 8:40/mi
Half· 13.11 mi
1:55:16
Rank: #20883 (-29)
20K → Half
6:03 | 8:52/mi
25K· 15.53 mi
2:16:23
Rank: #20512 (+371)
Half → 25K
21:07 | 8:43/mi
30K· 18.64 mi
2:44:01
Rank: #19857 (+655)
25K → 30K
27:38 | 8:54/mi
20M
2:55:59
Rank: #19558 (+299)
30K → 20M
11:58 | 8:48/mi
21M
3:05:00
Rank: #19230 (+328)
20M → 21M
9:01 | 9:01/mi
35K· 21.75 mi
3:11:35
Rank: #19161 (+69)
21M → 35K
6:35 | 8:48/mi
23M
3:22:52
Rank: #18988 (+173)
35K → 23M
11:17 | 9:01/mi
24M
3:31:45
Rank: #18897 (+91)
23M → 24M
8:53 | 8:53/mi
40K· 24.85 mi
3:39:16
Rank: #18757 (+140)
24M → 40K
7:31 | 8:47/mi
25.2M
3:42:27
Rank: #18649 (+108)
40K → 25.2M
3:11 | 9:14/mi
Finish· 26.22 mi
3:50:22
Rank: #18402 (+247)
25.2M → Finish
7:55 | 7:46/mi

The Course

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Half Splits

1st Half· via Half⚖️ Balanced
Distance13.11 mi
Time1:55:16
Pace8:48 /mi
2nd Half⚖️ Balanced
Distance13.11 mi
Time1:55:06
Pace8:47 /mi
📊Even Split: Consistent pacing between halves

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:44:1028:259:0928:25
9:09
-
10K
6.21 mi12:11:0255:178:5426:52
8:39
-0:30
15K
9.32 mi12:38:011:22:168:5026:59
8:41
+0:02
20K
12.43 mi13:04:581:49:138:4726:57
8:40
-0:01
Half
13.11 mi13:11:011:55:168:486:03
8:52
+0:12
25K
15.53 mi13:32:082:16:238:4721:07
8:43
-0:09
30K
18.64 mi13:59:462:44:018:4827:38
8:54
+0:11
20M
20.00 mi14:11:442:55:598:4811:58
8:48
-0:06
21M
21.00 mi14:20:453:05:008:499:01
9:01
+0:13
35K
21.75 mi14:27:203:11:358:496:35
8:48
-0:13
23M
23.00 mi14:38:373:22:528:4911:17
9:01
+0:13
24M
24.00 mi14:47:303:31:458:498:53
8:53
-0:08
40K
24.85 mi14:55:013:39:168:497:31
8:47
-0:06
25.2M
25.20 mi14:58:123:42:278:503:11
9:14
+0:27
Finish
26.22 mi15:06:073:50:228:487:55
7:46
-1:28

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

7:46 /mi

Average Pace

8:48 /mi

Slowest Pace

9:14 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

7:55

3% of race

Time at Steady Pace

3:39:16

95% of race

Time at Slower Pace

3:11

1% of race

Average Pace: 8:47 /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 mi11:44:1028:259:0928:25
9:09
#23028
10K
6.21 mi12:11:0255:178:5426:52
8:39
#21939
15K
9.32 mi12:38:011:22:168:5026:59
8:41
#21409
20K
12.43 mi13:04:581:49:138:4726:57
8:40
#20854
Half
13.11 mi13:11:011:55:168:486:03
8:52
#20883
25K
15.53 mi13:32:082:16:238:4721:07
8:43
#20512
30K
18.64 mi13:59:462:44:018:4827:38
8:54
#19857
20M
20.00 mi14:11:442:55:598:4811:58
8:48
#19558
21M
21.00 mi14:20:453:05:008:499:01
9:01
#19230
35K
21.75 mi14:27:203:11:358:496:35
8:48
#19161
23M
23.00 mi14:38:373:22:528:4911:17
9:01
#18988
24M
24.00 mi14:47:303:31:458:498:53
8:53
#18897
40K
24.85 mi14:55:013:39:168:497:31
8:47
#18757
25.2M
25.20 mi14:58:123:42:278:503:11
9:14
#18649
Finish
26.22 mi15:06:073:50:228:487:55
7:46
#18402
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi230289182918220408(Top 72%)7656(Top 63%)7656(Top 140%)
10K6.21 mi3.10 mi21939+10898570+6128570+61220590(Top 72%)7795(Top 64%)7795(Top 143%)
15K9.32 mi3.11 mi21409+5308253+3178253+31720408(Top 72%)7656(Top 63%)7656(Top 140%)
20K12.43 mi3.11 mi20854+5557954+2997954+29919287(Top 68%)7073(Top 58%)7073(Top 129%)
Half13.11 mi0.68 mi20883-297966-127966-1221234(Top 75%)8148(Top 67%)8148(Top 149%)
25K15.53 mi2.42 mi20512+3717779+1877779+18718464(Top 65%)6687(Top 55%)6687(Top 122%)
30K18.64 mi3.11 mi19857+6557438+3417438+34117135(Top 60%)6101(Top 50%)6101(Top 112%)
20M20.00 mi1.36 mi19558+2997294+1447294+14415739(Top 55%)5452(Top 45%)5452(Top 100%)
21M21.00 mi1.00 mi19230+3287131+1637131+16313670(Top 48%)4465(Top 37%)4465(Top 82%)
35K21.75 mi0.75 mi19161+697106+257106+2517283(Top 61%)6518(Top 53%)6518(Top 119%)
23M23.00 mi1.25 mi18988+1737041+657041+6516360(Top 58%)6097(Top 50%)6097(Top 111%)
24M24.00 mi1.00 mi18897+917018+237018+2316794(Top 59%)6384(Top 52%)6384(Top 117%)
40K24.85 mi0.85 mi18757+1406966+526966+5215186(Top 53%)5630(Top 46%)5630(Top 103%)
25.2M25.20 mi0.35 mi18649+1086918+486918+4813225(Top 47%)4644(Top 38%)4644(Top 85%)
Finish26.22 mi1.02 mi18402+2476804+1146804+11411269(Top 40%)3605(Top 29%)3605(Top 66%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 72%
×21stories
+97ft-345ft

Overall

20408

Females

7656

F18-39

7656

5K→10K

3.1 - 6.2 mi

Top 72%
×5stories
+79ft-138ft

Overall

20590

Females

7795

F18-39

7795

10K→15K

6.2 - 9.3 mi

Top 72%
×3stories
+67ft-78ft

Overall

20408

Females

7656

F18-39

7656

15K→20K

9.3 - 12.4 mi

Top 68%
×5stories
+106ft-86ft

Overall

19287

Females

7073

F18-39

7073

20K→Half

12.4 - 13.1 mi

Top 75%
×2stories
+19ft-37ft

Overall

21234

Females

8148

F18-39

8148

Half→25K

13.1 - 15.5 mi

Top 65%
×4stories
+66ft-88ft

Overall

18464

Females

6687

F18-39

6687

25K→30K

15.5 - 18.6 mi

Top 60%
×9stories
+181ft-148ft

Overall

17135

Females

6101

F18-39

6101

30K→20M

18.6 - 20.0 mi

Top 55%
×5stories
+64ft-50ft

Overall

15739

Females

5452

F18-39

5452

20M→21M

20.0 - 21.0 mi

Top 48%
×8stories
+106ft-24ft

Overall

13670

Females

4465

F18-39

4465

21M→35K

21.0 - 21.8 mi

Top 61%
×7stories
+17ft-86ft

Overall

17283

Females

6518

F18-39

6518

35K→23M

21.8 - 23.0 mi

Top 58%
×5stories
+23ft-63ft

Overall

16360

Females

6097

F18-39

6097

23M→24M

23.0 - 24.0 mi

Top 59%
×6stories
+12ft-82ft

Overall

16794

Females

6384

F18-39

6384

24M→40K

24.0 - 24.9 mi

Top 53%
×1story
+6ft-20ft

Overall

15186

Females

5630

F18-39

5630

40K→25.2M

24.9 - 25.2 mi

Top 47%
×1story
+13ft-16ft

Overall

13225

Females

4644

F18-39

4644

25.2M→Finish

25.2 - 26.2 mi

Top 40%
×2stories
+22ft-21ft

Overall

11269

Females

3605

F18-39

3605

Passing Analysis

Category:
Athletes Passed
4843
Passed By
217
Net Change
+4626
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#23028
5K → 10K110314+1089#23028#21939
10K → 15K56636+530#21939#21409
15K → 20K56611+555#21409#20854
20K → Half1847-29#20854#20883
Half → 25K38716+371#20883#20512
25K → 30K6638+655#20512#19857
30K → 20M3034+299#19857#19558
20M → 21M3313+328#19558#19230
21M → 35K9122+69#19230#19161
35K → 23M19219+173#19161#18988
23M → 24M11625+91#18988#18897
24M → 40K1499+140#18897#18757
40K → 25.2M1091+108#18757#18649
25.2M → Finish2492+247#18649#18402
TOTALS4843217+4626
📊

Passing Visuals

Category:
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🔥Passing Intensity

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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