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BOSTON MARATHON 2025

Brianna Crombie

Bib: 32448•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
29:08
Rank: #23835
Start → 5K
9:23/mi
29:08 split
10K· 6.21 mi
57:13
Rank: #23232 (+603)
5K → 10K
9:02/mi
28:05 split
15K· 9.32 mi
1:24:49
Rank: #22704 (+528)
10K → 15K
8:53/mi
27:36 split
20K· 12.43 mi
1:53:15
Rank: #22417 (+287)
15K → 20K
9:09/mi
28:26 split
Half· 13.11 mi
1:59:28
Rank: #22395 (+22)
20K → Half
9:07/mi
6:13 split
25K· 15.53 mi
2:22:42
Rank: #22388 (+7)
Half → 25K
9:35/mi
23:14 split
30K· 18.64 mi
2:53:56
Rank: #22275 (+113)
25K → 30K
10:03/mi
31:14 split
20M
3:07:42
Rank: #22201 (+74)
30K → 20M
10:08/mi
13:46 split
21M
3:19:31
Rank: #22260 (-59)
20M → 21M
11:49/mi
11:49 split
35K· 21.75 mi
3:28:07
Rank: #22399 (-139)
21M → 35K
11:30/mi
8:36 split
23M
3:43:16
Rank: #22620 (-221)
35K → 23M
12:06/mi
15:09 split
24M
3:55:16
Rank: #22792 (-172)
23M → 24M
12:00/mi
12:00 split
40K· 24.85 mi
4:05:27
Rank: #22911 (-119)
24M → 40K
11:55/mi
10:11 split
25.2M
4:10:19
Rank: #23021 (-110)
40K → 25.2M
14:07/mi
4:52 split
Finish· 26.22 mi
4:20:38
Rank: #23022 (-1)
25.2M → Finish
10:07/mi
10:19 split

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:59:28
Pace9:07 /mi
2nd Half
Distance13.11 mi
Time2:21:10
Pace10:46 /mi
📊Positive Split: 18.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:54:4529:089:2329:08
9:23
-
10K
6.21 mi12:22:5057:139:1228:05
9:02
-0:21
15K
9.32 mi12:50:261:24:499:0627:36
8:53
-0:09
20K
12.43 mi13:18:521:53:159:0728:26
9:09
+0:16
Half
13.11 mi13:25:051:59:289:076:13
9:07
-0:02
25K
15.53 mi13:48:192:22:429:1123:14
9:35
+0:28
30K
18.64 mi14:19:332:53:569:2031:14
10:03
+0:28
20M
20.00 mi14:33:193:07:429:2313:46
10:08
+0:05
21M
21.00 mi14:45:083:19:319:3011:49
11:49
+1:41
35K
21.75 mi14:53:443:28:079:348:36
11:30
-0:19
23M
23.00 mi15:08:533:43:169:4215:09
12:06
+0:36
24M
24.00 mi15:20:533:55:169:4812:00
12:00
-0:06
40K
24.85 mi15:31:044:05:279:5310:11
11:55
-0:05
25.2M
25.20 mi15:35:564:10:199:564:52
14:07
+2:12
Finish
26.22 mi15:46:154:20:389:5710:19
10:07
-4:00

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

8:53 /mi

Average Pace

9:57 /mi

Slowest Pace

14:07 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:30:20

35% of race

Time at Steady Pace

1:47:41

41% of race

Time at Slower Pace

1:02:37

24% of race

Average Pace: 9:56 /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 mi11:54:4529:089:2329:08
9:23
#23835
10K
6.21 mi12:22:5057:139:1228:05
9:02
#23232
15K
9.32 mi12:50:261:24:499:0627:36
8:53
#22704
20K
12.43 mi13:18:521:53:159:0728:26
9:09
#22417
Half
13.11 mi13:25:051:59:289:076:13
9:07
#22395
25K
15.53 mi13:48:192:22:429:1123:14
9:35
#22388
30K
18.64 mi14:19:332:53:569:2031:14
10:03
#22275
20M
20.00 mi14:33:193:07:429:2313:46
10:08
#22201
21M
21.00 mi14:45:083:19:319:3011:49
11:49
#22260
35K
21.75 mi14:53:443:28:079:348:36
11:30
#22399
23M
23.00 mi15:08:533:43:169:4215:09
12:06
#22620
24M
24.00 mi15:20:533:55:169:4812:00
12:00
#22792
40K
24.85 mi15:31:044:05:279:5310:11
11:55
#22911
25.2M
25.20 mi15:35:564:10:199:564:52
14:07
#23021
Finish
26.22 mi15:46:154:20:389:5710:19
10:07
#23022
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi238359609960921498(Top 76%)8278(Top 68%)8278(Top 151%)
10K6.21 mi3.10 mi23232+6039275+3349275+33422561(Top 79%)8902(Top 73%)8902(Top 163%)
15K9.32 mi3.11 mi22704+5288962+3138962+31321498(Top 76%)8278(Top 68%)8278(Top 151%)
20K12.43 mi3.11 mi22417+2878824+1388824+13821699(Top 76%)8431(Top 69%)8431(Top 154%)
Half13.11 mi0.68 mi22395+228817+78817+722313(Top 79%)8795(Top 72%)8795(Top 161%)
25K15.53 mi2.42 mi22388+78804+138804+1322139(Top 78%)8731(Top 71%)8731(Top 160%)
30K18.64 mi3.11 mi22275+1138781+238781+2321751(Top 77%)8643(Top 71%)8643(Top 158%)
20M20.00 mi1.36 mi22201+748754+278754+2721396(Top 75%)8574(Top 70%)8574(Top 157%)
21M21.00 mi1.00 mi22260-598808-548808-5423258(Top 82%)9636(Top 79%)9636(Top 176%)
35K21.75 mi0.75 mi22399-1398901-938901-9325099(Top 88%)10633(Top 87%)10633(Top 194%)
23M23.00 mi1.25 mi22620-2219055-1549055-15425269(Top 89%)10743(Top 88%)10743(Top 196%)
24M24.00 mi1.00 mi22792-1729172-1179172-11725687(Top 90%)10973(Top 90%)10973(Top 201%)
40K24.85 mi0.85 mi22911-1199260-889260-8824784(Top 87%)10565(Top 86%)10565(Top 193%)
25.2M25.20 mi0.35 mi23021-1109323-639323-6326417(Top 93%)11383(Top 93%)11383(Top 208%)
Finish26.22 mi1.02 mi23022-19331-89331-823312(Top 82%)9826(Top 80%)9826(Top 180%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 76%
×21stories
+97ft-345ft

Overall

21498

Females

8278

F18-39

8278

5K→10K

3.1 - 6.2 mi

Top 79%
×5stories
+79ft-138ft

Overall

22561

Females

8902

F18-39

8902

10K→15K

6.2 - 9.3 mi

Top 76%
×3stories
+67ft-78ft

Overall

21498

Females

8278

F18-39

8278

15K→20K

9.3 - 12.4 mi

Top 76%
×5stories
+106ft-86ft

Overall

21699

Females

8431

F18-39

8431

20K→Half

12.4 - 13.1 mi

Top 79%
×2stories
+19ft-37ft

Overall

22313

Females

8795

F18-39

8795

Half→25K

13.1 - 15.5 mi

Top 78%
×4stories
+66ft-88ft

Overall

22139

Females

8731

F18-39

8731

25K→30K

15.5 - 18.6 mi

Top 77%
×9stories
+181ft-148ft

Overall

21751

Females

8643

F18-39

8643

30K→20M

18.6 - 20.0 mi

Top 75%
×5stories
+64ft-50ft

Overall

21396

Females

8574

F18-39

8574

20M→21M

20.0 - 21.0 mi

Top 82%
×8stories
+106ft-24ft

Overall

23258

Females

9636

F18-39

9636

21M→35K

21.0 - 21.8 mi

Top 88%
×7stories
+17ft-86ft

Overall

25099

Females

10633

F18-39

10633

35K→23M

21.8 - 23.0 mi

Top 89%
×5stories
+23ft-63ft

Overall

25269

Females

10743

F18-39

10743

23M→24M

23.0 - 24.0 mi

Top 90%
×6stories
+12ft-82ft

Overall

25687

Females

10973

F18-39

10973

24M→40K

24.0 - 24.9 mi

Top 87%
×1story
+6ft-20ft

Overall

24784

Females

10565

F18-39

10565

40K→25.2M

24.9 - 25.2 mi

Top 93%
×1story
+13ft-16ft

Overall

26417

Females

11383

F18-39

11383

25.2M→Finish

25.2 - 26.2 mi

Top 82%
×2stories
+22ft-21ft

Overall

23312

Females

9826

F18-39

9826

Passing Analysis

Category:
Athletes Passed
2254
Passed By
1441
Net Change
+813
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#23835
5K → 10K65653+603#23835#23232
10K → 15K54820+528#23232#22704
15K → 20K32639+287#22704#22417
20K → Half4826+22#22417#22395
Half → 25K150143+7#22395#22388
25K → 30K238125+113#22388#22275
30K → 20M10632+74#22275#22201
20M → 21M67126-59#22201#22260
21M → 35K13152-139#22260#22399
35K → 23M26247-221#22399#22620
23M → 24M20192-172#22620#22792
24M → 40K19138-119#22792#22911
40K → 25.2M2112-110#22911#23021
25.2M → Finish3536-1#23021#23022
TOTALS22541441+813
📊

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