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BOSTON MARATHON 2025

Nicholas Merckling

Bib: 31221•M

DC

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 48%
Gender (Male)
#0 / 16105
Division (M18-39)
#0 / 5642
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
8:54/mi
27:38
↑ 97↓ 3451.5%
10K· 6.21 mi
8:46/mi
54:51
↑ 79↓ 1380.4%
15K· 9.32 mi
7:56/mi
1:19:30
↑ 67↓ 78
20K· 12.43 mi
7:40/mi
1:43:20
↑ 106↓ 860.1%
Half· 13.11 mi
7:39/mi
1:48:33
↑ 19↓ 370.5%
25K· 15.53 mi
7:36/mi
2:06:58
↑ 66↓ 880.2%
30K· 18.64 mi
7:54/mi
2:31:31
↑ 181↓ 1480.2%
20M
7:48/mi
2:42:07
↑ 64↓ 500.2%
21M
8:16/mi
2:50:23
↑ 106↓ 241.6%
35K· 21.75 mi
7:40/mi
2:56:07
↑ 17↓ 861.7%
23M
7:59/mi
3:06:07
↑ 23↓ 630.6%
24M
7:57/mi
3:14:04
↓ 821.3%
40K· 24.85 mi
7:50/mi
3:20:46
↓ 200.3%
25.2M
8:22/mi
3:23:39
↑ 13↓ 160.2%
Finish· 26.22 mi
7:26/mi
3:31:14
↑ 22↓ 21

The Course

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Half Splits

1st Half· via Half
Distance13.11 mi
Time1:48:33
Pace8:17 /mi
2nd Half✓ Faster
Distance13.11 mi
Time1:42:41
Pace7:50 /mi
📊Negative Split: 5.4% faster second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:53:0427:388:5427:38
8:54
-
10K
6.21 mi12:20:1754:518:5027:13
8:46
-0:08
15K
9.32 mi12:44:561:19:308:3224:39
7:56
-0:50
20K
12.43 mi13:08:461:43:208:1923:50
7:40
-0:16
Half
13.11 mi13:13:591:48:338:175:13
7:39
-0:01
25K
15.53 mi13:32:242:06:588:1018:25
7:36
-0:03
30K
18.64 mi13:56:572:31:318:0824:33
7:54
+0:18
20M
20.00 mi14:07:332:42:078:0610:36
7:48
-0:06
21M
21.00 mi14:15:492:50:238:078:16
8:16
+0:28
35K
21.75 mi14:21:332:56:078:065:44
7:40
-0:36
23M
23.00 mi14:31:333:06:078:0610:00
7:59
+0:19
24M
24.00 mi14:39:303:14:048:057:57
7:57
-0:02
40K
24.85 mi14:46:123:20:468:056:42
7:50
-0:07
25.2M
25.20 mi14:49:053:23:398:052:53
8:22
+0:32
Finish
26.22 mi14:56:403:31:148:047:35
7:26
-0:56

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

7:26 /mi

Average Pace

8:04 /mi

Slowest Pace

8:54 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:25:14

69% of race

Time at Steady Pace

38:22

18% of race

Time at Slower Pace

27:38

13% 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 mi11:53:0427:388:5427:38
8:54
#21962
10K
6.21 mi12:20:1754:518:5027:13
8:46
#21582
15K
9.32 mi12:44:561:19:308:3224:39
7:56
#19852
20K
12.43 mi13:08:461:43:208:1923:50
7:40
#18086
Half
13.11 mi13:13:591:48:338:175:13
7:39
#17854
25K
15.53 mi13:32:242:06:588:1018:25
7:36
#16791
30K
18.64 mi13:56:572:31:318:0824:33
7:54
#15730
20M
20.00 mi14:07:332:42:078:0610:36
7:48
#15184
21M
21.00 mi14:15:492:50:238:078:16
8:16
#14767
35K
21.75 mi14:21:332:56:078:065:44
7:40
#14551
23M
23.00 mi14:31:333:06:078:0610:00
7:59
#14278
24M
24.00 mi14:39:303:14:048:057:57
7:57
#14098
40K
24.85 mi14:46:123:20:468:056:42
7:50
#13863
25.2M
25.20 mi14:49:053:23:398:052:53
8:22
#13748
Finish
26.22 mi14:56:403:31:148:047:35
7:26
#13543
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi21962132931329315497(Top 55%)10588(Top 66%)10588(Top 188%)
10K6.21 mi3.10 mi21582+38013142+15113142+15121191(Top 75%)12993(Top 81%)12993(Top 230%)
15K9.32 mi3.11 mi19852+173012413+72912413+72915497(Top 55%)10588(Top 66%)10588(Top 188%)
20K12.43 mi3.11 mi18086+176611648+76511648+76512146(Top 43%)9040(Top 56%)9040(Top 160%)
Half13.11 mi0.68 mi17854+23211543+10511543+10512931(Top 46%)9438(Top 59%)9438(Top 167%)
25K15.53 mi2.42 mi16791+106311099+44411099+44410723(Top 38%)8257(Top 51%)8257(Top 146%)
30K18.64 mi3.11 mi15730+106110611+48810611+48810647(Top 37%)8007(Top 50%)8007(Top 142%)
20M20.00 mi1.36 mi15184+54610338+27310338+2739035(Top 32%)7022(Top 44%)7022(Top 124%)
21M21.00 mi1.00 mi14767+41710137+20110137+2019014(Top 32%)6833(Top 42%)6833(Top 121%)
35K21.75 mi0.75 mi14551+21610026+11110026+1119801(Top 35%)7279(Top 45%)7279(Top 129%)
23M23.00 mi1.25 mi14278+2739863+1639863+1639930(Top 35%)7205(Top 45%)7205(Top 128%)
24M24.00 mi1.00 mi14098+1809744+1199744+11910885(Top 38%)7621(Top 47%)7621(Top 135%)
40K24.85 mi0.85 mi13863+2359601+1439601+1439024(Top 32%)6548(Top 41%)6548(Top 116%)
25.2M25.20 mi0.35 mi13748+1159544+579544+577971(Top 28%)5912(Top 37%)5912(Top 105%)
Finish26.22 mi1.02 mi13543+2059443+1019443+1018779(Top 31%)6333(Top 39%)6333(Top 112%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 55%
×21story building
+97ft-345ft

Overall

15497

Males

10588

M18-39

10588

5K→10K

3.1 - 6.2 mi

Top 75%
×5story building
+79ft-138ft

Overall

21191

Males

12993

M18-39

12993

10K→15K

6.2 - 9.3 mi

Top 55%
×3story building
+67ft-78ft

Overall

15497

Males

10588

M18-39

10588

15K→20K

9.3 - 12.4 mi

Top 43%
×5story building
+106ft-86ft

Overall

12146

Males

9040

M18-39

9040

20K→Half

12.4 - 13.1 mi

Top 46%
×2story building
+19ft-37ft

Overall

12931

Males

9438

M18-39

9438

Half→25K

13.1 - 15.5 mi

Top 38%
×4story building
+66ft-88ft

Overall

10723

Males

8257

M18-39

8257

25K→30K

15.5 - 18.6 mi

Top 37%
×9story building
+181ft-148ft

Overall

10647

Males

8007

M18-39

8007

30K→20M

18.6 - 20.0 mi

Top 32%
×5story building
+64ft-50ft

Overall

9035

Males

7022

M18-39

7022

20M→21M

20.0 - 21.0 mi

Top 32%
×8story building
+106ft-24ft

Overall

9014

Males

6833

M18-39

6833

21M→35K

21.0 - 21.8 mi

Top 35%
×7story building
+17ft-86ft

Overall

9801

Males

7279

M18-39

7279

35K→23M

21.8 - 23.0 mi

Top 35%
×5story building
+23ft-63ft

Overall

9930

Males

7205

M18-39

7205

23M→24M

23.0 - 24.0 mi

Top 38%
×6story building
+12ft-82ft

Overall

10885

Males

7621

M18-39

7621

24M→40K

24.0 - 24.9 mi

Top 32%
×1story
+6ft-20ft

Overall

9024

Males

6548

M18-39

6548

40K→25.2M

24.9 - 25.2 mi

Top 28%
×1story
+13ft-16ft

Overall

7971

Males

5912

M18-39

5912

25.2M→Finish

25.2 - 26.2 mi

Top 31%
×2story building
+22ft-21ft

Overall

8779

Males

6333

M18-39

6333

Passing Analysis

Category:
Athletes Passed
8579
Passed By
160
Net Change
+8419
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#21962
5K → 10K503123+380#21962#21582
10K → 15K17300+1730#21582#19852
15K → 20K17671+1766#19852#18086
20K → Half2320+232#18086#17854
Half → 25K10630+1063#17854#16791
25K → 30K10621+1061#16791#15730
30K → 20M5460+546#15730#15184
20M → 21M4192+417#15184#14767
21M → 35K2215+216#14767#14551
35K → 23M2796+273#14551#14278
23M → 24M19414+180#14278#14098
24M → 40K2361+235#14098#13863
40K → 25.2M1150+115#13863#13748
25.2M → Finish2127+205#13748#13543
TOTALS8579160+8419
📊

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