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BOSTON MARATHON 2025

Katelyn Korzec

Bib: 28626•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
28:35
Rank: #23236
Start → 5K
28:35 | 9:12/mi
10K· 6.21 mi
56:56
Rank: #23072 (+164)
5K → 10K
28:21 | 9:07/mi
15K· 9.32 mi
1:25:49
Rank: #23142 (-70)
10K → 15K
28:53 | 9:18/mi
20K· 12.43 mi
1:54:39
Rank: #22890 (+252)
15K → 20K
28:50 | 9:17/mi
Half· 13.11 mi
2:00:53
Rank: #22867 (+23)
20K → Half
6:14 | 9:08/mi
25K· 15.53 mi
2:23:29
Rank: #22562 (+305)
Half → 25K
22:36 | 9:19/mi
30K· 18.64 mi
2:52:51
Rank: #22072 (+490)
25K → 30K
29:22 | 9:27/mi
20M
3:05:48
Rank: #21829 (+243)
30K → 20M
12:57 | 9:32/mi
21M
3:15:23
Rank: #21549 (+280)
20M → 21M
9:35 | 9:35/mi
35K· 21.75 mi
3:21:35
Rank: #21327 (+222)
21M → 35K
6:12 | 8:17/mi
23M
3:32:09
Rank: #20931 (+396)
35K → 23M
10:34 | 8:26/mi
24M
3:40:50
Rank: #20741 (+190)
23M → 24M
8:41 | 8:41/mi
40K· 24.85 mi
3:48:15
Rank: #20552 (+189)
24M → 40K
7:25 | 8:40/mi
25.2M
3:51:35
Rank: #20495 (+57)
40K → 25.2M
3:20 | 9:40/mi
Finish· 26.22 mi
4:00:05
Rank: #20362 (+133)
25.2M → Finish
8:30 | 8:20/mi

The Course

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Half Splits

1st Half· via Half
Distance13.11 mi
Time2:00:53
Pace9:13 /mi
2nd Half✓ Faster
Distance13.11 mi
Time1:59:12
Pace9:06 /mi
📊Negative Split: 1.4% faster second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:45:3728:359:1228:35
9:12
-
10K
6.21 mi12:13:5856:569:1028:21
9:07
-0:05
15K
9.32 mi12:42:511:25:499:1228:53
9:18
+0:11
20K
12.43 mi13:11:411:54:399:1428:50
9:17
-0:01
Half
13.11 mi13:17:552:00:539:136:14
9:08
-0:09
25K
15.53 mi13:40:312:23:299:1422:36
9:19
+0:11
30K
18.64 mi14:09:532:52:519:1629:22
9:27
+0:08
20M
20.00 mi14:22:503:05:489:1712:57
9:32
+0:05
21M
21.00 mi14:32:253:15:239:189:35
9:35
+0:03
35K
21.75 mi14:38:373:21:359:166:12
8:17
-1:18
23M
23.00 mi14:49:113:32:099:1310:34
8:26
+0:09
24M
24.00 mi14:57:523:40:509:128:41
8:41
+0:15
40K
24.85 mi15:05:173:48:159:117:25
8:40
-0:01
25.2M
25.20 mi15:08:373:51:359:113:20
9:40
+1:00
Finish
26.22 mi15:17:074:00:059:108:30
8:20
-1:20

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

8:17 /mi

Average Pace

9:10 /mi

Slowest Pace

9:40 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

41:22

17% of race

Time at Steady Pace

3:18:43

83% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 9:09 /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 mi11:45:3728:359:1228:35
9:12
#23236
10K
6.21 mi12:13:5856:569:1028:21
9:07
#23072
15K
9.32 mi12:42:511:25:499:1228:53
9:18
#23142
20K
12.43 mi13:11:411:54:399:1428:50
9:17
#22890
Half
13.11 mi13:17:552:00:539:136:14
9:08
#22867
25K
15.53 mi13:40:312:23:299:1422:36
9:19
#22562
30K
18.64 mi14:09:532:52:519:1629:22
9:27
#22072
20M
20.00 mi14:22:503:05:489:1712:57
9:32
#21829
21M
21.00 mi14:32:253:15:239:189:35
9:35
#21549
35K
21.75 mi14:38:373:21:359:166:12
8:17
#21327
23M
23.00 mi14:49:113:32:099:1310:34
8:26
#20931
24M
24.00 mi14:57:523:40:509:128:41
8:41
#20741
40K
24.85 mi15:05:173:48:159:117:25
8:40
#20552
25.2M
25.20 mi15:08:373:51:359:113:20
9:40
#20495
Finish
26.22 mi15:17:074:00:059:108:30
8:20
#20362
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi232369293929323209(Top 82%)9209(Top 75%)9209(Top 168%)
10K6.21 mi3.10 mi23072+1649187+1069187+10622912(Top 81%)9078(Top 74%)9078(Top 166%)
15K9.32 mi3.11 mi23142-709211-249211-2423209(Top 82%)9209(Top 75%)9209(Top 168%)
20K12.43 mi3.11 mi22890+2529066+1459066+14522217(Top 78%)8707(Top 71%)8707(Top 159%)
Half13.11 mi0.68 mi22867+239051+159051+1522376(Top 79%)8806(Top 72%)8806(Top 161%)
25K15.53 mi2.42 mi22562+3058902+1498902+14921265(Top 75%)8241(Top 67%)8241(Top 151%)
30K18.64 mi3.11 mi22072+4908660+2428660+24219761(Top 70%)7531(Top 62%)7531(Top 138%)
20M20.00 mi1.36 mi21829+2438539+1218539+12119328(Top 68%)7439(Top 61%)7439(Top 136%)
21M21.00 mi1.00 mi21549+2808415+1248415+12416503(Top 58%)5991(Top 49%)5991(Top 110%)
35K21.75 mi0.75 mi21327+2228306+1098306+10914240(Top 50%)4828(Top 39%)4828(Top 88%)
23M23.00 mi1.25 mi20931+3968126+1808126+18012973(Top 46%)4267(Top 35%)4267(Top 78%)
24M24.00 mi1.00 mi20741+1908036+908036+9015694(Top 55%)5760(Top 47%)5760(Top 105%)
40K24.85 mi0.85 mi20552+1897951+857951+8514526(Top 51%)5271(Top 43%)5271(Top 96%)
25.2M25.20 mi0.35 mi20495+577925+267925+2615553(Top 55%)5877(Top 48%)5877(Top 107%)
Finish26.22 mi1.02 mi20362+1337870+557870+5515240(Top 54%)5625(Top 46%)5625(Top 103%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 82%
×21stories
+97ft-345ft

Overall

23209

Females

9209

F18-39

9209

5K→10K

3.1 - 6.2 mi

Top 81%
×5stories
+79ft-138ft

Overall

22912

Females

9078

F18-39

9078

10K→15K

6.2 - 9.3 mi

Top 82%
×3stories
+67ft-78ft

Overall

23209

Females

9209

F18-39

9209

15K→20K

9.3 - 12.4 mi

Top 78%
×5stories
+106ft-86ft

Overall

22217

Females

8707

F18-39

8707

20K→Half

12.4 - 13.1 mi

Top 79%
×2stories
+19ft-37ft

Overall

22376

Females

8806

F18-39

8806

Half→25K

13.1 - 15.5 mi

Top 75%
×4stories
+66ft-88ft

Overall

21265

Females

8241

F18-39

8241

25K→30K

15.5 - 18.6 mi

Top 70%
×9stories
+181ft-148ft

Overall

19761

Females

7531

F18-39

7531

30K→20M

18.6 - 20.0 mi

Top 68%
×5stories
+64ft-50ft

Overall

19328

Females

7439

F18-39

7439

20M→21M

20.0 - 21.0 mi

Top 58%
×8stories
+106ft-24ft

Overall

16503

Females

5991

F18-39

5991

21M→35K

21.0 - 21.8 mi

Top 50%
×7stories
+17ft-86ft

Overall

14240

Females

4828

F18-39

4828

35K→23M

21.8 - 23.0 mi

Top 46%
×5stories
+23ft-63ft

Overall

12973

Females

4267

F18-39

4267

23M→24M

23.0 - 24.0 mi

Top 55%
×6stories
+12ft-82ft

Overall

15694

Females

5760

F18-39

5760

24M→40K

24.0 - 24.9 mi

Top 51%
×1story
+6ft-20ft

Overall

14526

Females

5271

F18-39

5271

40K→25.2M

24.9 - 25.2 mi

Top 55%
×1story
+13ft-16ft

Overall

15553

Females

5877

F18-39

5877

25.2M→Finish

25.2 - 26.2 mi

Top 54%
×2stories
+22ft-21ft

Overall

15240

Females

5625

F18-39

5625

Passing Analysis

Category:
Athletes Passed
3377
Passed By
503
Net Change
+2874
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#23236
5K → 10K317153+164#23236#23072
10K → 15K150220-70#23072#23142
15K → 20K30755+252#23142#22890
20K → Half3815+23#22890#22867
Half → 25K32419+305#22867#22562
25K → 30K50818+490#22562#22072
30K → 20M2485+243#22072#21829
20M → 21M2800+280#21829#21549
21M → 35K2220+222#21549#21327
35K → 23M3960+396#21327#20931
23M → 24M1977+190#20931#20741
24M → 40K1901+189#20741#20552
40K → 25.2M647+57#20552#20495
25.2M → Finish1363+133#20495#20362
TOTALS3377503+2874
📊

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