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BOSTON MARATHON 2025

Tiffany Chandler

Bib: 18243•F

FL

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 48%
Gender (Female)
#0 / 12228
Top 33%
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
24:26
Rank: #15380
Start → 5K
24:26 | 7:52/mi
10K· 6.21 mi
48:27
Rank: #14775 (+605)
5K → 10K
24:01 | 7:44/mi
15K· 9.32 mi
1:12:21
Rank: #14318 (+457)
10K → 15K
23:54 | 7:42/mi
20K· 12.43 mi
1:37:02
Rank: #14320 (-2)
15K → 20K
24:41 | 7:57/mi
Half· 13.11 mi
1:42:18
Rank: #14275 (+45)
20K → Half
5:16 | 7:43/mi
25K· 15.53 mi
2:01:51
Rank: #14252 (+23)
Half → 25K
19:33 | 8:04/mi
30K· 18.64 mi
2:28:03
Rank: #14212 (+40)
25K → 30K
26:12 | 8:26/mi
20M
2:39:33
Rank: #14138 (+74)
30K → 20M
11:30 | 8:28/mi
21M
2:48:25
Rank: #13999 (+139)
20M → 21M
8:52 | 8:52/mi
35K· 21.75 mi
2:54:32
Rank: #13973 (+26)
21M → 35K
6:07 | 8:11/mi
23M
3:05:21
Rank: #13996 (-23)
35K → 23M
10:49 | 8:38/mi
24M
3:13:22
Rank: #13854 (+142)
23M → 24M
8:01 | 8:01/mi
40K· 24.85 mi
3:20:19
Rank: #13714 (+140)
24M → 40K
6:57 | 8:08/mi
25.2M
3:23:18
Rank: #13637 (+77)
40K → 25.2M
2:59 | 8:39/mi
Finish· 26.22 mi
3:31:06
Rank: #13510 (+127)
25.2M → Finish
7:48 | 7:39/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:42:18
Pace7:48 /mi
2nd Half
Distance13.11 mi
Time1:48:48
Pace8:18 /mi
📊Positive Split: 6.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:15:3724:267:5224:26
7:52
-
10K
6.21 mi11:39:3848:277:4824:01
7:44
-0:08
15K
9.32 mi12:03:321:12:217:4623:54
7:42
-0:02
20K
12.43 mi12:28:131:37:027:4824:41
7:57
+0:15
Half
13.11 mi12:33:291:42:187:485:16
7:43
-0:14
25K
15.53 mi12:53:022:01:517:5119:33
8:04
+0:21
30K
18.64 mi13:19:142:28:037:5726:12
8:26
+0:22
20M
20.00 mi13:30:442:39:337:5911:30
8:28
+0:02
21M
21.00 mi13:39:362:48:258:018:52
8:52
+0:24
35K
21.75 mi13:45:432:54:328:026:07
8:11
-0:41
23M
23.00 mi13:56:323:05:218:0410:49
8:38
+0:27
24M
24.00 mi14:04:333:13:228:038:01
8:01
-0:37
40K
24.85 mi14:11:303:20:198:046:57
8:08
+0:07
25.2M
25.20 mi14:14:293:23:188:042:59
8:39
+0:31
Finish
26.22 mi14:22:173:31:068:037:48
7:39
-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

7:39 /mi

Average Pace

8:03 /mi

Slowest Pace

8:52 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:30:44

71% of race

Time at Steady Pace

1:00:22

29% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:03 /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 mi11:15:3724:267:5224:26
7:52
#15380
10K
6.21 mi11:39:3848:277:4824:01
7:44
#14775
15K
9.32 mi12:03:321:12:217:4623:54
7:42
#14318
20K
12.43 mi12:28:131:37:027:4824:41
7:57
#14320
Half
13.11 mi12:33:291:42:187:485:16
7:43
#14275
25K
15.53 mi12:53:022:01:517:5119:33
8:04
#14252
30K
18.64 mi13:19:142:28:037:5726:12
8:26
#14212
20M
20.00 mi13:30:442:39:337:5911:30
8:28
#14138
21M
21.00 mi13:39:362:48:258:018:52
8:52
#13999
35K
21.75 mi13:45:432:54:328:026:07
8:11
#13973
23M
23.00 mi13:56:323:05:218:0410:49
8:38
#13996
24M
24.00 mi14:04:333:13:228:038:01
8:01
#13854
40K
24.85 mi14:11:303:20:198:046:57
8:08
#13714
25.2M
25.20 mi14:14:293:23:188:042:59
8:39
#13637
Finish
26.22 mi14:22:173:31:068:037:48
7:39
#13510
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi153804765476513447(Top 47%)3709(Top 30%)3709(Top 68%)
10K6.21 mi3.10 mi14775+6054416+3494416+34914182(Top 50%)4070(Top 33%)4070(Top 74%)
15K9.32 mi3.11 mi14318+4574148+2684148+26813447(Top 47%)3709(Top 30%)3709(Top 68%)
20K12.43 mi3.11 mi14320-24184-364184-3614498(Top 51%)4360(Top 36%)4360(Top 80%)
Half13.11 mi0.68 mi14275+454166+184166+1813633(Top 48%)3855(Top 32%)3855(Top 70%)
25K15.53 mi2.42 mi14252+234190-244190-2414376(Top 51%)4411(Top 36%)4411(Top 81%)
30K18.64 mi3.11 mi14212+404228-384228-3814356(Top 51%)4559(Top 37%)4559(Top 83%)
20M20.00 mi1.36 mi14138+744211+174211+1713554(Top 48%)4271(Top 35%)4271(Top 78%)
21M21.00 mi1.00 mi13999+1394164+474164+4712736(Top 45%)3997(Top 33%)3997(Top 73%)
35K21.75 mi0.75 mi13973+264173-94173-913483(Top 47%)4414(Top 36%)4414(Top 81%)
23M23.00 mi1.25 mi13996-234217-444217-4414191(Top 50%)4894(Top 40%)4894(Top 89%)
24M24.00 mi1.00 mi13854+1424178+394178+3911401(Top 40%)3524(Top 29%)3524(Top 64%)
40K24.85 mi0.85 mi13714+1404123+554123+5511138(Top 39%)3483(Top 28%)3483(Top 64%)
25.2M25.20 mi0.35 mi13637+774094+294094+299831(Top 35%)2957(Top 24%)2957(Top 54%)
Finish26.22 mi1.02 mi13510+1274044+504044+5010394(Top 37%)3180(Top 26%)3180(Top 58%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 47%
×21stories
+97ft-345ft

Overall

13447

Females

3709

F18-39

3709

5K→10K

3.1 - 6.2 mi

Top 50%
×5stories
+79ft-138ft

Overall

14182

Females

4070

F18-39

4070

10K→15K

6.2 - 9.3 mi

Top 47%
×3stories
+67ft-78ft

Overall

13447

Females

3709

F18-39

3709

15K→20K

9.3 - 12.4 mi

Top 51%
×5stories
+106ft-86ft

Overall

14498

Females

4360

F18-39

4360

20K→Half

12.4 - 13.1 mi

Top 48%
×2stories
+19ft-37ft

Overall

13633

Females

3855

F18-39

3855

Half→25K

13.1 - 15.5 mi

Top 51%
×4stories
+66ft-88ft

Overall

14376

Females

4411

F18-39

4411

25K→30K

15.5 - 18.6 mi

Top 51%
×9stories
+181ft-148ft

Overall

14356

Females

4559

F18-39

4559

30K→20M

18.6 - 20.0 mi

Top 48%
×5stories
+64ft-50ft

Overall

13554

Females

4271

F18-39

4271

20M→21M

20.0 - 21.0 mi

Top 45%
×8stories
+106ft-24ft

Overall

12736

Females

3997

F18-39

3997

21M→35K

21.0 - 21.8 mi

Top 47%
×7stories
+17ft-86ft

Overall

13483

Females

4414

F18-39

4414

35K→23M

21.8 - 23.0 mi

Top 50%
×5stories
+23ft-63ft

Overall

14191

Females

4894

F18-39

4894

23M→24M

23.0 - 24.0 mi

Top 40%
×6stories
+12ft-82ft

Overall

11401

Females

3524

F18-39

3524

24M→40K

24.0 - 24.9 mi

Top 39%
×1story
+6ft-20ft

Overall

11138

Females

3483

F18-39

3483

40K→25.2M

24.9 - 25.2 mi

Top 35%
×1story
+13ft-16ft

Overall

9831

Females

2957

F18-39

2957

25.2M→Finish

25.2 - 26.2 mi

Top 37%
×2stories
+22ft-21ft

Overall

10394

Females

3180

F18-39

3180

Passing Analysis

Category:
Athletes Passed
2964
Passed By
1094
Net Change
+1870
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#15380
5K → 10K69792+605#15380#14775
10K → 15K48730+457#14775#14318
15K → 20K220222-2#14318#14320
20K → Half5712+45#14320#14275
Half → 25K172149+23#14275#14252
25K → 30K271231+40#14252#14212
30K → 20M14470+74#14212#14138
20M → 21M18142+139#14138#13999
21M → 35K7953+26#13999#13973
35K → 23M107130-23#13973#13996
23M → 24M16624+142#13996#13854
24M → 40K15212+140#13854#13714
40K → 25.2M858+77#13714#13637
25.2M → Finish14619+127#13637#13510
TOTALS29641094+1870
📊

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