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BOSTON MARATHON 2025

Merritt Blum

Bib: 10301•F

GA

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

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
7:20/mi
22:46
↑ 97↓ 3451.5%
10K· 6.21 mi
7:33/mi
46:13
↑ 79↓ 1380.4%
15K· 9.32 mi
7:53/mi
1:10:43
↑ 67↓ 78
20K· 12.43 mi
8:16/mi
1:36:24
↑ 106↓ 860.1%
Half· 13.11 mi
8:27/mi
1:42:10
↑ 19↓ 370.5%
25K· 15.53 mi
8:45/mi
2:03:23
↑ 66↓ 880.2%
30K· 18.64 mi
9:20/mi
2:32:24
↑ 181↓ 1480.2%
20M
9:52/mi
2:45:48
↑ 64↓ 500.2%
21M
10:34/mi
2:56:22
↑ 106↓ 241.6%
35K· 21.75 mi
9:27/mi
3:03:26
↑ 17↓ 861.7%
23M
10:16/mi
3:16:17
↑ 23↓ 630.6%
24M
9:21/mi
3:25:38
↓ 821.3%
40K· 24.85 mi
10:26/mi
3:34:33
↓ 200.3%
25.2M
11:30/mi
3:38:31
↑ 13↓ 160.2%
Finish· 26.22 mi
10:53/mi
3:49:36
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:42:10
Pace7:48 /mi
2nd Half
Distance13.11 mi
Time2:07:26
Pace9:43 /mi
📊Positive Split: 24.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:48:4922:467:2022:46
7:20
-
10K
6.21 mi11:12:1646:137:2623:27
7:33
+0:13
15K
9.32 mi11:36:461:10:437:3524:30
7:53
+0:20
20K
12.43 mi12:02:271:36:247:4525:41
8:16
+0:23
Half
13.11 mi12:08:131:42:107:485:46
8:27
+0:11
25K
15.53 mi12:29:262:03:237:5721:13
8:45
+0:18
30K
18.64 mi12:58:272:32:248:1129:01
9:20
+0:35
20M
20.00 mi13:11:512:45:488:1713:24
9:52
+0:32
21M
21.00 mi13:22:252:56:228:2410:34
10:34
+0:42
35K
21.75 mi13:29:293:03:268:267:04
9:27
-1:07
23M
23.00 mi13:42:203:16:178:3212:51
10:16
+0:49
24M
24.00 mi13:51:413:25:388:349:21
9:21
-0:55
40K
24.85 mi14:00:363:34:338:388:55
10:26
+1:05
25.2M
25.20 mi14:04:343:38:318:403:58
11:30
+1:04
Finish
26.22 mi14:15:393:49:368:4611:05
10:53
-0:37

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

7:20 /mi

Average Pace

8:46 /mi

Slowest Pace

11:30 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:42:10

44% of race

Time at Steady Pace

1:20:03

35% of race

Time at Slower Pace

47:23

21% of race

Average Pace: 8:45 /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 mi10:48:4922:467:2022:46
7:20
#10674
10K
6.21 mi11:12:1646:137:2623:27
7:33
#11604
15K
9.32 mi11:36:461:10:437:3524:30
7:53
#12759
20K
12.43 mi12:02:271:36:247:4525:41
8:16
#13883
Half
13.11 mi12:08:131:42:107:485:46
8:27
#14197
25K
15.53 mi12:29:262:03:237:5721:13
8:45
#15108
30K
18.64 mi12:58:272:32:248:1129:01
9:20
#16055
20M
20.00 mi13:11:512:45:488:1713:24
9:52
#16445
21M
21.00 mi13:22:252:56:228:2410:34
10:34
#16705
35K
21.75 mi13:29:293:03:268:267:04
9:27
#16838
23M
23.00 mi13:42:203:16:178:3212:51
10:16
#17256
24M
24.00 mi13:51:413:25:388:349:21
9:21
#17344
40K
24.85 mi14:00:363:34:338:388:55
10:26
#17594
25.2M
25.20 mi14:04:343:38:318:403:58
11:30
#17700
Finish
26.22 mi14:15:393:49:368:4611:05
10:53
#18234
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi106742131213115141(Top 53%)4665(Top 38%)4665(Top 85%)
10K6.21 mi3.10 mi11604-9302608-4772608-47712567(Top 44%)3134(Top 26%)3134(Top 57%)
15K9.32 mi3.11 mi12759-11553246-6383246-63815141(Top 53%)4665(Top 38%)4665(Top 85%)
20K12.43 mi3.11 mi13883-11243945-6993945-69916759(Top 59%)5643(Top 46%)5643(Top 103%)
Half13.11 mi0.68 mi14197-3144121-1764121-17618931(Top 67%)6854(Top 56%)6854(Top 125%)
25K15.53 mi2.42 mi15108-9114668-5474668-54718676(Top 66%)6799(Top 56%)6799(Top 124%)
30K18.64 mi3.11 mi16055-9475254-5865254-58619299(Top 68%)7283(Top 60%)7283(Top 133%)
20M20.00 mi1.36 mi16445-3905526-2725526-27220491(Top 72%)8068(Top 66%)8068(Top 148%)
21M21.00 mi1.00 mi16705-2605706-1805706-18020227(Top 71%)8032(Top 66%)8032(Top 147%)
35K21.75 mi0.75 mi16838-1335795-895795-8920151(Top 71%)8054(Top 66%)8054(Top 147%)
23M23.00 mi1.25 mi17256-4186088-2936088-29321321(Top 75%)8711(Top 71%)8711(Top 159%)
24M24.00 mi1.00 mi17344-886163-756163-7519042(Top 67%)7562(Top 62%)7562(Top 138%)
40K24.85 mi0.85 mi17594-2506332-1696332-16921726(Top 76%)9051(Top 74%)9051(Top 165%)
25.2M25.20 mi0.35 mi17700-1066398-666398-6622065(Top 78%)9175(Top 75%)9175(Top 168%)
Finish26.22 mi1.02 mi18234-5346702-3046702-30425137(Top 88%)10714(Top 88%)10714(Top 196%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 53%
×21story building
+97ft-345ft

Overall

15141

Females

4665

F18-39

4665

5K→10K

3.1 - 6.2 mi

Top 44%
×5story building
+79ft-138ft

Overall

12567

Females

3134

F18-39

3134

10K→15K

6.2 - 9.3 mi

Top 53%
×3story building
+67ft-78ft

Overall

15141

Females

4665

F18-39

4665

15K→20K

9.3 - 12.4 mi

Top 59%
×5story building
+106ft-86ft

Overall

16759

Females

5643

F18-39

5643

20K→Half

12.4 - 13.1 mi

Top 67%
×2story building
+19ft-37ft

Overall

18931

Females

6854

F18-39

6854

Half→25K

13.1 - 15.5 mi

Top 66%
×4story building
+66ft-88ft

Overall

18676

Females

6799

F18-39

6799

25K→30K

15.5 - 18.6 mi

Top 68%
×9story building
+181ft-148ft

Overall

19299

Females

7283

F18-39

7283

30K→20M

18.6 - 20.0 mi

Top 72%
×5story building
+64ft-50ft

Overall

20491

Females

8068

F18-39

8068

20M→21M

20.0 - 21.0 mi

Top 71%
×8story building
+106ft-24ft

Overall

20227

Females

8032

F18-39

8032

21M→35K

21.0 - 21.8 mi

Top 71%
×7story building
+17ft-86ft

Overall

20151

Females

8054

F18-39

8054

35K→23M

21.8 - 23.0 mi

Top 75%
×5story building
+23ft-63ft

Overall

21321

Females

8711

F18-39

8711

23M→24M

23.0 - 24.0 mi

Top 67%
×6story building
+12ft-82ft

Overall

19042

Females

7562

F18-39

7562

24M→40K

24.0 - 24.9 mi

Top 76%
×1story
+6ft-20ft

Overall

21726

Females

9051

F18-39

9051

40K→25.2M

24.9 - 25.2 mi

Top 78%
×1story
+13ft-16ft

Overall

22065

Females

9175

F18-39

9175

25.2M→Finish

25.2 - 26.2 mi

Top 88%
×2story building
+22ft-21ft

Overall

25137

Females

10714

F18-39

10714

Passing Analysis

Category:
Athletes Passed
448
Passed By
8008
Net Change
-7560
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#10674
5K → 10K42972-930#10674#11604
10K → 15K251180-1155#11604#12759
15K → 20K371161-1124#12759#13883
20K → Half0314-314#13883#14197
Half → 25K34945-911#14197#15108
25K → 30K601007-947#15108#16055
30K → 20M36426-390#16055#16445
20M → 21M48308-260#16445#16705
21M → 35K30163-133#16705#16838
35K → 23M41459-418#16838#17256
23M → 24M61149-88#17256#17344
24M → 40K19269-250#17344#17594
40K → 25.2M8114-106#17594#17700
25.2M → Finish7541-534#17700#18234
TOTALS4488008-7560
📊

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