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BOSTON MARATHON 2025

Chelsey Bush

Bib: 17648•F

MD

0:00
0:00
/ mi
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Overall
#0 / 28404
Gender (Female)
#0 / 12228
Top 42%
Division (F18-39)
#0 / 5469
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
7:44/mi
24:03
↑ 97↓ 3451.5%
10K· 6.21 mi
7:40/mi
47:53
↑ 79↓ 1380.4%
15K· 9.32 mi
7:33/mi
1:11:19
↑ 67↓ 78
20K· 12.43 mi
7:35/mi
1:34:54
↑ 106↓ 860.1%
Half· 13.11 mi
7:34/mi
1:40:04
↑ 19↓ 370.5%
25K· 15.53 mi
7:51/mi
1:59:05
↑ 66↓ 880.2%
30K· 18.64 mi
8:23/mi
2:25:07
↑ 181↓ 1480.2%
20M
9:07/mi
2:37:30
↑ 64↓ 500.2%
21M
10:45/mi
2:48:15
↑ 106↓ 241.6%
35K· 21.75 mi
9:35/mi
2:55:25
↑ 17↓ 861.7%
23M
10:53/mi
3:09:02
↑ 23↓ 630.6%
24M
9:40/mi
3:18:42
↓ 821.3%
40K· 24.85 mi
9:35/mi
3:26:54
↓ 200.3%
25.2M
9:37/mi
3:30:13
↑ 13↓ 160.2%
Finish· 26.22 mi
8:20/mi
3:38:43
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:40:04
Pace7:38 /mi
2nd Half
Distance13.11 mi
Time1:58:39
Pace9:03 /mi
📊Positive Split: 18.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:14:4224:037:4424:03
7:44
-
10K
6.21 mi11:38:3247:537:4223:50
7:40
-0:04
15K
9.32 mi12:01:581:11:197:3923:26
7:33
-0:07
20K
12.43 mi12:25:331:34:547:3823:35
7:35
+0:02
Half
13.11 mi12:30:431:40:047:385:10
7:34
-0:01
25K
15.53 mi12:49:441:59:057:4019:01
7:51
+0:17
30K
18.64 mi13:15:462:25:077:4726:02
8:23
+0:32
20M
20.00 mi13:28:092:37:307:5212:23
9:07
+0:44
21M
21.00 mi13:38:542:48:158:0110:45
10:45
+1:38
35K
21.75 mi13:46:042:55:258:047:10
9:35
-1:10
23M
23.00 mi13:59:413:09:028:1313:37
10:53
+1:18
24M
24.00 mi14:09:213:18:428:179:40
9:40
-1:13
40K
24.85 mi14:17:333:26:548:198:12
9:35
-0:05
25.2M
25.20 mi14:20:523:30:138:213:19
9:37
+0:02
Finish
26.22 mi14:29:223:38:438:218:30
8:20
-1:17

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

7:33 /mi

Average Pace

8:21 /mi

Slowest Pace

10:53 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:40:04

46% of race

Time at Steady Pace

53:33

24% of race

Time at Slower Pace

1:05:06

30% of race

Average Pace: 8:20 /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 mi11:14:4224:037:4424:03
7:44
#14316
10K
6.21 mi11:38:3247:537:4223:50
7:40
#13964
15K
9.32 mi12:01:581:11:197:3923:26
7:33
#13336
20K
12.43 mi12:25:331:34:547:3823:35
7:35
#12804
Half
13.11 mi12:30:431:40:047:385:10
7:34
#12779
25K
15.53 mi12:49:441:59:057:4019:01
7:51
#12727
30K
18.64 mi13:15:462:25:077:4726:02
8:23
#12946
20M
20.00 mi13:28:092:37:307:5212:23
9:07
#13343
21M
21.00 mi13:38:542:48:158:0110:45
10:45
#13946
35K
21.75 mi13:46:042:55:258:047:10
9:35
#14335
23M
23.00 mi13:59:413:09:028:1313:37
10:53
#15171
24M
24.00 mi14:09:213:18:428:179:40
9:40
#15467
40K
24.85 mi14:17:333:26:548:198:12
9:35
#15591
25.2M
25.20 mi14:20:523:30:138:213:19
9:37
#15572
Finish
26.22 mi14:29:223:38:438:218:30
8:20
#15541
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi143164115411512152(Top 43%)2994(Top 24%)2994(Top 55%)
10K6.21 mi3.10 mi13964+3523920+1953920+19513653(Top 48%)3756(Top 31%)3756(Top 69%)
15K9.32 mi3.11 mi13336+6283597+3233597+32312152(Top 43%)2994(Top 24%)2994(Top 55%)
20K12.43 mi3.11 mi12804+5323333+2643333+26411539(Top 41%)2764(Top 23%)2764(Top 51%)
Half13.11 mi0.68 mi12779+253325+83325+812460(Top 44%)3227(Top 26%)3227(Top 59%)
25K15.53 mi2.42 mi12727+523323+23323+212723(Top 45%)3520(Top 29%)3520(Top 64%)
30K18.64 mi3.11 mi12946-2193520-1973520-19714030(Top 49%)4389(Top 36%)4389(Top 80%)
20M20.00 mi1.36 mi13343-3973767-2473767-24717374(Top 61%)6347(Top 52%)6347(Top 116%)
21M21.00 mi1.00 mi13946-6034136-3694136-36920725(Top 73%)8300(Top 68%)8300(Top 152%)
35K21.75 mi0.75 mi14335-3894358-2224358-22220609(Top 73%)8291(Top 68%)8291(Top 152%)
23M23.00 mi1.25 mi15171-8364871-5134871-51322943(Top 81%)9571(Top 78%)9571(Top 175%)
24M24.00 mi1.00 mi15467-2965073-2025073-20220273(Top 71%)8220(Top 67%)8220(Top 150%)
40K24.85 mi0.85 mi15591-1245177-1045177-10419066(Top 67%)7659(Top 63%)7659(Top 140%)
25.2M25.20 mi0.35 mi15572+195178-15178-115222(Top 54%)5663(Top 46%)5663(Top 104%)
Finish26.22 mi1.02 mi15541+315176+25176+215214(Top 54%)5599(Top 46%)5599(Top 102%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 43%
×21story building
+97ft-345ft

Overall

12152

Females

2994

F18-39

2994

5K→10K

3.1 - 6.2 mi

Top 48%
×5story building
+79ft-138ft

Overall

13653

Females

3756

F18-39

3756

10K→15K

6.2 - 9.3 mi

Top 43%
×3story building
+67ft-78ft

Overall

12152

Females

2994

F18-39

2994

15K→20K

9.3 - 12.4 mi

Top 41%
×5story building
+106ft-86ft

Overall

11539

Females

2764

F18-39

2764

20K→Half

12.4 - 13.1 mi

Top 44%
×2story building
+19ft-37ft

Overall

12460

Females

3227

F18-39

3227

Half→25K

13.1 - 15.5 mi

Top 45%
×4story building
+66ft-88ft

Overall

12723

Females

3520

F18-39

3520

25K→30K

15.5 - 18.6 mi

Top 49%
×9story building
+181ft-148ft

Overall

14030

Females

4389

F18-39

4389

30K→20M

18.6 - 20.0 mi

Top 61%
×5story building
+64ft-50ft

Overall

17374

Females

6347

F18-39

6347

20M→21M

20.0 - 21.0 mi

Top 73%
×8story building
+106ft-24ft

Overall

20725

Females

8300

F18-39

8300

21M→35K

21.0 - 21.8 mi

Top 73%
×7story building
+17ft-86ft

Overall

20609

Females

8291

F18-39

8291

35K→23M

21.8 - 23.0 mi

Top 81%
×5story building
+23ft-63ft

Overall

22943

Females

9571

F18-39

9571

23M→24M

23.0 - 24.0 mi

Top 71%
×6story building
+12ft-82ft

Overall

20273

Females

8220

F18-39

8220

24M→40K

24.0 - 24.9 mi

Top 67%
×1story
+6ft-20ft

Overall

19066

Females

7659

F18-39

7659

40K→25.2M

24.9 - 25.2 mi

Top 54%
×1story
+13ft-16ft

Overall

15222

Females

5663

F18-39

5663

25.2M→Finish

25.2 - 26.2 mi

Top 54%
×2story building
+22ft-21ft

Overall

15214

Females

5599

F18-39

5599

Passing Analysis

Category:
Athletes Passed
2345
Passed By
3570
Net Change
-1225
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#14316
5K → 10K487135+352#14316#13964
10K → 15K64517+628#13964#13336
15K → 20K55220+532#13336#12804
20K → Half4722+25#12804#12779
Half → 25K181129+52#12779#12727
25K → 30K168387-219#12727#12946
30K → 20M41438-397#12946#13343
20M → 21M22625-603#13343#13946
21M → 35K11400-389#13946#14335
35K → 23M14850-836#14335#15171
23M → 24M22318-296#15171#15467
24M → 40K40164-124#15467#15591
40K → 25.2M3718+19#15591#15572
25.2M → Finish7847+31#15572#15541
TOTALS23453570-1225
📊

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