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BOSTON MARATHON 2025

Christopher Grundberg

Bib: 9179•M

NY

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Top 23%
Gender (Male)
#0 / 16105
Top 35%
Masters (Masters Men)
#0 / 10463
Top 22%
Division (M40-44)
#0 / 2247
Top 48%
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
6:51/mi
21:17
↑ 97↓ 3451.5%
10K· 6.21 mi
6:53/mi
42:39
↑ 79↓ 1380.4%
15K· 9.32 mi
6:54/mi
1:04:06
↑ 67↓ 78
20K· 12.43 mi
6:59/mi
1:25:49
↑ 106↓ 860.1%
Half· 13.11 mi
6:58/mi
1:30:34
↑ 19↓ 370.5%
25K· 15.53 mi
7:10/mi
1:47:57
↑ 66↓ 880.2%
30K· 18.64 mi
7:28/mi
2:11:08
↑ 181↓ 1480.2%
20M
7:31/mi
2:21:21
↑ 64↓ 500.2%
21M
7:54/mi
2:29:15
↑ 106↓ 241.6%
35K· 21.75 mi
7:16/mi
2:34:41
↑ 17↓ 861.7%
23M
7:39/mi
2:44:16
↑ 23↓ 630.6%
24M
7:18/mi
2:51:34
↓ 821.3%
40K· 24.85 mi
7:27/mi
2:57:56
↓ 200.3%
25.2M
8:19/mi
3:00:48
↑ 13↓ 160.2%
Finish· 26.22 mi
7:19/mi
3:08:15
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:30:34
Pace6:55 /mi
2nd Half
Distance13.11 mi
Time1:37:41
Pace7:27 /mi
📊Positive Split: 7.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:46:4821:176:5121:17
6:51
-
10K
6.21 mi11:08:1042:396:5221:22
6:53
+0:02
15K
9.32 mi11:29:371:04:066:5321:27
6:54
+0:01
20K
12.43 mi11:51:201:25:496:5421:43
6:59
+0:05
Half
13.11 mi11:56:051:30:346:554:45
6:58
-0:01
25K
15.53 mi12:13:281:47:576:5717:23
7:10
+0:12
30K
18.64 mi12:36:392:11:087:0223:11
7:28
+0:18
20M
20.00 mi12:46:522:21:217:0410:13
7:31
+0:03
21M
21.00 mi12:54:462:29:157:067:54
7:54
+0:23
35K
21.75 mi13:00:122:34:417:075:26
7:16
-0:38
23M
23.00 mi13:09:472:44:167:099:35
7:39
+0:23
24M
24.00 mi13:17:052:51:347:097:18
7:18
-0:21
40K
24.85 mi13:23:272:57:567:106:22
7:27
+0:09
25.2M
25.20 mi13:26:193:00:487:102:52
8:19
+0:52
Finish
26.22 mi13:33:463:08:157:117:27
7:19
-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

6:51 /mi

Average Pace

7:11 /mi

Slowest Pace

8:19 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:30:34

48% of race

Time at Steady Pace

1:07:07

36% of race

Time at Slower Pace

30:34

16% of race

Average Pace: 7:11 /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 mi10:46:4821:176:5121:17
6:51
#6702
10K
6.21 mi11:08:1042:396:5221:22
6:53
#6878
15K
9.32 mi11:29:371:04:066:5321:27
6:54
#6883
20K
12.43 mi11:51:201:25:496:5421:43
6:59
#6861
Half
13.11 mi11:56:051:30:346:554:45
6:58
#6893
25K
15.53 mi12:13:281:47:576:5717:23
7:10
#6923
30K
18.64 mi12:36:392:11:087:0223:11
7:28
#6888
20M
20.00 mi12:46:522:21:217:0410:13
7:31
#6814
21M
21.00 mi12:54:462:29:157:067:54
7:54
#6741
35K
21.75 mi13:00:122:34:417:075:26
7:16
#6703
23M
23.00 mi13:09:472:44:167:099:35
7:39
#6679
24M
24.00 mi13:17:052:51:347:097:18
7:18
#6610
40K
24.85 mi13:23:272:57:567:106:22
7:27
#6557
25.2M
25.20 mi13:26:193:00:487:102:52
8:19
#6551
Finish
26.22 mi13:33:463:08:157:117:27
7:19
#6556
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM40-44Seg. OverallSeg. MalesSeg. M40-44
5K3.11 mi3.11 mi6702607760776980(Top 25%)6233(Top 39%)6233(Top 277%)
10K6.21 mi3.10 mi6878-1766202-1256202-1257072(Top 25%)6330(Top 39%)6330(Top 282%)
15K9.32 mi3.11 mi6883-56189+136189+136980(Top 25%)6233(Top 39%)6233(Top 277%)
20K12.43 mi3.11 mi6861+226177+126177+126815(Top 24%)6068(Top 38%)6068(Top 270%)
Half13.11 mi0.68 mi6893-326193-166193-167267(Top 26%)6409(Top 40%)6409(Top 285%)
25K15.53 mi2.42 mi6923-306198-56198-57383(Top 26%)6368(Top 40%)6368(Top 283%)
30K18.64 mi3.11 mi6888+356123+756123+757464(Top 26%)6252(Top 39%)6252(Top 278%)
20M20.00 mi1.36 mi6814+746043+806043+807118(Top 25%)5913(Top 37%)5913(Top 263%)
21M21.00 mi1.00 mi6741+735969+745969+746777(Top 24%)5548(Top 34%)5548(Top 247%)
35K21.75 mi0.75 mi6703+385926+435926+436965(Top 25%)5675(Top 35%)5675(Top 253%)
23M23.00 mi1.25 mi6679+245874+525874+527586(Top 27%)5916(Top 37%)5916(Top 263%)
24M24.00 mi1.00 mi6610+695799+755799+756413(Top 23%)5168(Top 32%)5168(Top 230%)
40K24.85 mi0.85 mi6557+535739+605739+606469(Top 23%)5125(Top 32%)5125(Top 228%)
25.2M25.20 mi0.35 mi6551+65720+195720+197659(Top 27%)5718(Top 36%)5718(Top 254%)
Finish26.22 mi1.02 mi6556-55693+275693+277827(Top 28%)5805(Top 36%)5805(Top 258%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 25%
×21story building
+97ft-345ft

Overall

6980

Males

6233

M40-44

6233

5K→10K

3.1 - 6.2 mi

Top 25%
×5story building
+79ft-138ft

Overall

7072

Males

6330

M40-44

6330

10K→15K

6.2 - 9.3 mi

Top 25%
×3story building
+67ft-78ft

Overall

6980

Males

6233

M40-44

6233

15K→20K

9.3 - 12.4 mi

Top 24%
×5story building
+106ft-86ft

Overall

6815

Males

6068

M40-44

6068

20K→Half

12.4 - 13.1 mi

Top 26%
×2story building
+19ft-37ft

Overall

7267

Males

6409

M40-44

6409

Half→25K

13.1 - 15.5 mi

Top 26%
×4story building
+66ft-88ft

Overall

7383

Males

6368

M40-44

6368

25K→30K

15.5 - 18.6 mi

Top 26%
×9story building
+181ft-148ft

Overall

7464

Males

6252

M40-44

6252

30K→20M

18.6 - 20.0 mi

Top 25%
×5story building
+64ft-50ft

Overall

7118

Males

5913

M40-44

5913

20M→21M

20.0 - 21.0 mi

Top 24%
×8story building
+106ft-24ft

Overall

6777

Males

5548

M40-44

5548

21M→35K

21.0 - 21.8 mi

Top 25%
×7story building
+17ft-86ft

Overall

6965

Males

5675

M40-44

5675

35K→23M

21.8 - 23.0 mi

Top 27%
×5story building
+23ft-63ft

Overall

7586

Males

5916

M40-44

5916

23M→24M

23.0 - 24.0 mi

Top 23%
×6story building
+12ft-82ft

Overall

6413

Males

5168

M40-44

5168

24M→40K

24.0 - 24.9 mi

Top 23%
×1story
+6ft-20ft

Overall

6469

Males

5125

M40-44

5125

40K→25.2M

24.9 - 25.2 mi

Top 27%
×1story
+13ft-16ft

Overall

7659

Males

5718

M40-44

5718

25.2M→Finish

25.2 - 26.2 mi

Top 28%
×2story building
+22ft-21ft

Overall

7827

Males

5805

M40-44

5805

Passing Analysis

Category:
Athletes Passed
1426
Passed By
1280
Net Change
+146
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#6702
5K → 10K134310-176#6702#6878
10K → 15K145150-5#6878#6883
15K → 20K138116+22#6883#6861
20K → Half2254-32#6861#6893
Half → 25K103133-30#6893#6923
25K → 30K194159+35#6923#6888
30K → 20M12551+74#6888#6814
20M → 21M11441+73#6814#6741
21M → 35K6224+38#6741#6703
35K → 23M10177+24#6703#6679
23M → 24M10233+69#6679#6610
24M → 40K7825+53#6610#6557
40K → 25.2M3428+6#6557#6551
25.2M → Finish7479-5#6551#6556
TOTALS14261280+146
📊

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