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BOSTON MARATHON 2025

Chalee Welch

Bib: 15399•F

MA

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 35%
Gender (Female)
#0 / 12228
Top 18%
Division (F18-39)
#0 / 5469
Top 32%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
24:35
Rank: #15821
Start → 5K
24:35 | 7:55/mi
10K· 6.21 mi
48:44
Rank: #15177 (+644)
5K → 10K
24:09 | 7:46/mi
15K· 9.32 mi
1:12:22
Rank: #14325 (+852)
10K → 15K
23:38 | 7:36/mi
20K· 12.43 mi
1:36:09
Rank: #13685 (+640)
15K → 20K
23:47 | 7:39/mi
Half· 13.11 mi
1:41:27
Rank: #13704 (-19)
20K → Half
5:18 | 7:46/mi
25K· 15.53 mi
1:59:59
Rank: #13226 (+478)
Half → 25K
18:32 | 7:39/mi
30K· 18.64 mi
2:23:19
Rank: #12159 (+1067)
25K → 30K
23:20 | 7:31/mi
20M
2:33:37
Rank: #11738 (+421)
30K → 20M
10:18 | 7:35/mi
21M
2:41:22
Rank: #11326 (+412)
20M → 21M
7:45 | 7:45/mi
35K· 21.75 mi
2:46:54
Rank: #11185 (+141)
21M → 35K
5:32 | 7:24/mi
23M
2:56:12
Rank: #10825 (+360)
35K → 23M
9:18 | 7:26/mi
24M
3:03:30
Rank: #10588 (+237)
23M → 24M
7:18 | 7:18/mi
40K· 24.85 mi
3:09:46
Rank: #10366 (+222)
24M → 40K
6:16 | 7:20/mi
25.2M
3:12:29
Rank: #10255 (+111)
40K → 25.2M
2:43 | 7:53/mi
Finish· 26.22 mi
3:19:30
Rank: #9996 (+259)
25.2M → Finish
7:01 | 6:53/mi

The Course

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Half Splits

1st Half· via Half
Distance13.11 mi
Time1:41:27
Pace7:44 /mi
2nd Half✓ Faster
Distance13.11 mi
Time1:38:03
Pace7:29 /mi
📊Negative Split: 3.4% faster second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:56:3024:357:5524:35
7:55
-
10K
6.21 mi11:20:3948:447:5124:09
7:46
-0:09
15K
9.32 mi11:44:171:12:227:4623:38
7:36
-0:10
20K
12.43 mi12:08:041:36:097:4423:47
7:39
+0:03
Half
13.11 mi12:13:221:41:277:445:18
7:46
+0:07
25K
15.53 mi12:31:541:59:597:4318:32
7:39
-0:07
30K
18.64 mi12:55:142:23:197:4123:20
7:31
-0:08
20M
20.00 mi13:05:322:33:377:4110:18
7:35
+0:04
21M
21.00 mi13:13:172:41:227:417:45
7:45
+0:10
35K
21.75 mi13:18:492:46:547:405:32
7:24
-0:21
23M
23.00 mi13:28:072:56:127:409:18
7:26
+0:02
24M
24.00 mi13:35:253:03:307:397:18
7:18
-0:08
40K
24.85 mi13:41:413:09:467:386:16
7:20
+0:02
25.2M
25.20 mi13:44:243:12:297:382:43
7:53
+0:33
Finish
26.22 mi13:51:253:19:307:377:01
6:53
-1:00

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

6:53 /mi

Average Pace

7:37 /mi

Slowest Pace

7:55 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

58:45

29% of race

Time at Steady Pace

2:20:45

71% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:37 /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 mi10:56:3024:357:5524:35
7:55
#15821
10K
6.21 mi11:20:3948:447:5124:09
7:46
#15177
15K
9.32 mi11:44:171:12:227:4623:38
7:36
#14325
20K
12.43 mi12:08:041:36:097:4423:47
7:39
#13685
Half
13.11 mi12:13:221:41:277:445:18
7:46
#13704
25K
15.53 mi12:31:541:59:597:4318:32
7:39
#13226
30K
18.64 mi12:55:142:23:197:4123:20
7:31
#12159
20M
20.00 mi13:05:322:33:377:4110:18
7:35
#11738
21M
21.00 mi13:13:172:41:227:417:45
7:45
#11326
35K
21.75 mi13:18:492:46:547:405:32
7:24
#11185
23M
23.00 mi13:28:072:56:127:409:18
7:26
#10825
24M
24.00 mi13:35:253:03:307:397:18
7:18
#10588
40K
24.85 mi13:41:413:09:467:386:16
7:20
#10366
25.2M
25.20 mi13:44:243:12:297:382:43
7:53
#10255
Finish
26.22 mi13:51:253:19:307:377:01
6:53
#9996
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi158215030503012657(Top 45%)3246(Top 27%)3246(Top 59%)
10K6.21 mi3.10 mi15177+6444645+3854645+38514558(Top 51%)4282(Top 35%)4282(Top 78%)
15K9.32 mi3.11 mi14325+8524150+4954150+49512657(Top 45%)3246(Top 27%)3246(Top 59%)
20K12.43 mi3.11 mi13685+6403831+3193831+31911995(Top 42%)2990(Top 24%)2990(Top 55%)
Half13.11 mi0.68 mi13704-193853-223853-2213983(Top 49%)4016(Top 33%)4016(Top 73%)
25K15.53 mi2.42 mi13226+4783611+2423611+24211100(Top 39%)2633(Top 22%)2633(Top 48%)
30K18.64 mi3.11 mi12159+10673076+5353076+5357838(Top 28%)1331(Top 11%)1331(Top 24%)
20M20.00 mi1.36 mi11738+4212893+1832893+1837573(Top 27%)1374(Top 11%)1374(Top 25%)
21M21.00 mi1.00 mi11326+4122718+1752718+1755956(Top 21%)911(Top 7%)911(Top 17%)
35K21.75 mi0.75 mi11185+1412667+512667+517955(Top 28%)1672(Top 14%)1672(Top 31%)
23M23.00 mi1.25 mi10825+3602518+1492518+1496240(Top 22%)1119(Top 9%)1119(Top 20%)
24M24.00 mi1.00 mi10588+2372436+822436+826458(Top 23%)1255(Top 10%)1255(Top 23%)
40K24.85 mi0.85 mi10366+2222355+812355+815861(Top 21%)1093(Top 9%)1093(Top 20%)
25.2M25.20 mi0.35 mi10255+1112318+372318+375418(Top 19%)1048(Top 9%)1048(Top 19%)
Finish26.22 mi1.02 mi9996+2592219+992219+995035(Top 18%)891(Top 7%)891(Top 16%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 45%
×21stories
+97ft-345ft

Overall

12657

Females

3246

F18-39

3246

5K→10K

3.1 - 6.2 mi

Top 51%
×5stories
+79ft-138ft

Overall

14558

Females

4282

F18-39

4282

10K→15K

6.2 - 9.3 mi

Top 45%
×3stories
+67ft-78ft

Overall

12657

Females

3246

F18-39

3246

15K→20K

9.3 - 12.4 mi

Top 42%
×5stories
+106ft-86ft

Overall

11995

Females

2990

F18-39

2990

20K→Half

12.4 - 13.1 mi

Top 49%
×2stories
+19ft-37ft

Overall

13983

Females

4016

F18-39

4016

Half→25K

13.1 - 15.5 mi

Top 39%
×4stories
+66ft-88ft

Overall

11100

Females

2633

F18-39

2633

25K→30K

15.5 - 18.6 mi

Top 28%
×9stories
+181ft-148ft

Overall

7838

Females

1331

F18-39

1331

30K→20M

18.6 - 20.0 mi

Top 27%
×5stories
+64ft-50ft

Overall

7573

Females

1374

F18-39

1374

20M→21M

20.0 - 21.0 mi

Top 21%
×8stories
+106ft-24ft

Overall

5956

Females

911

F18-39

911

21M→35K

21.0 - 21.8 mi

Top 28%
×7stories
+17ft-86ft

Overall

7955

Females

1672

F18-39

1672

35K→23M

21.8 - 23.0 mi

Top 22%
×5stories
+23ft-63ft

Overall

6240

Females

1119

F18-39

1119

23M→24M

23.0 - 24.0 mi

Top 23%
×6stories
+12ft-82ft

Overall

6458

Females

1255

F18-39

1255

24M→40K

24.0 - 24.9 mi

Top 21%
×1story
+6ft-20ft

Overall

5861

Females

1093

F18-39

1093

40K→25.2M

24.9 - 25.2 mi

Top 19%
×1story
+13ft-16ft

Overall

5418

Females

1048

F18-39

1048

25.2M→Finish

25.2 - 26.2 mi

Top 18%
×2stories
+22ft-21ft

Overall

5035

Females

891

F18-39

891

Passing Analysis

Category:
Athletes Passed
6009*
Passed By
184
Net Change
+5825
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#15821
5K → 10K73995+644#15821#15177
10K → 15K8575+852#15177#14325
15K → 20K6499+640#14325#13685
20K → Half3049-19#13685#13704
Half → 25K4835+478#13704#13226
25K → 30K10670+1067#13226#12159
30K → 20M4210+421#12159#11738
20M → 21M4120+412#11738#11326
21M → 35K1454+141#11326#11185
35K → 23M3644+360#11185#10825
23M → 24M2414+237#10825#10588
24M → 40K2253+222#10588#10366
40K → 25.2M1132+111#10366#10255
25.2M → Finish263*4+259#10255#9996
TOTALS6009*184+5825

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

📊

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