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BOSTON MARATHON 2025

James Gronquist

Bib: 19957•M

WA

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Male)
#0 / 16105
Masters (Masters Men)
#0 / 10463
Division (M55-59)
#0 / 1648
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
8:18/mi
25:48
↑ 97↓ 3451.5%
10K· 6.21 mi
8:24/mi
51:55
↑ 79↓ 1380.4%
15K· 9.32 mi
8:27/mi
1:18:09
↑ 67↓ 78
20K· 12.43 mi
8:35/mi
1:44:48
↑ 106↓ 860.1%
Half· 13.11 mi
8:29/mi
1:50:35
↑ 19↓ 370.5%
25K· 15.53 mi
8:45/mi
2:11:48
↑ 66↓ 880.2%
30K· 18.64 mi
9:11/mi
2:40:19
↑ 181↓ 1480.2%
20M
9:27/mi
2:53:10
↑ 64↓ 500.2%
21M
10:11/mi
3:03:21
↑ 106↓ 241.6%
35K· 21.75 mi
9:40/mi
3:10:35
↑ 17↓ 861.7%
23M
10:06/mi
3:23:14
↑ 23↓ 630.6%
24M
9:55/mi
3:33:09
↓ 821.3%
40K· 24.85 mi
11:00/mi
3:42:33
↓ 200.3%
25.2M
11:36/mi
3:46:33
↑ 13↓ 160.2%
Finish· 26.22 mi
9:26/mi
3:56:10
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:50:35
Pace8:26 /mi
2nd Half
Distance13.11 mi
Time2:05:35
Pace9:35 /mi
📊Positive Split: 13.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:18:0325:488:1825:48
8:18
-
10K
6.21 mi11:44:1051:558:2126:07
8:24
+0:06
15K
9.32 mi12:10:241:18:098:2326:14
8:27
+0:03
20K
12.43 mi12:37:031:44:488:2626:39
8:35
+0:08
Half
13.11 mi12:42:501:50:358:265:47
8:29
-0:06
25K
15.53 mi13:04:032:11:488:2921:13
8:45
+0:16
30K
18.64 mi13:32:342:40:198:3628:31
9:11
+0:26
20M
20.00 mi13:45:252:53:108:3912:51
9:27
+0:16
21M
21.00 mi13:55:363:03:218:4410:11
10:11
+0:44
35K
21.75 mi14:02:503:10:358:467:14
9:40
-0:31
23M
23.00 mi14:15:293:23:148:5012:39
10:06
+0:26
24M
24.00 mi14:25:243:33:098:539:55
9:55
-0:11
40K
24.85 mi14:34:483:42:338:579:24
11:00
+1:05
25.2M
25.20 mi14:38:483:46:338:594:00
11:36
+0:36
Finish
26.22 mi14:48:253:56:109:019:37
9:26
-2:10

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

8:18 /mi

Average Pace

9:01 /mi

Slowest Pace

11:36 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:11:48

56% of race

Time at Steady Pace

58:13

25% of race

Time at Slower Pace

46:09

20% of race

Average Pace: 9:00 /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 mi11:18:0325:488:1825:48
8:18
#18735
10K
6.21 mi11:44:1051:558:2126:07
8:24
#18958
15K
9.32 mi12:10:241:18:098:2326:14
8:27
#18934
20K
12.43 mi12:37:031:44:488:2626:39
8:35
#18847
Half
13.11 mi12:42:501:50:358:265:47
8:29
#18862
25K
15.53 mi13:04:032:11:488:2921:13
8:45
#18823
30K
18.64 mi13:32:342:40:198:3628:31
9:11
#18751
20M
20.00 mi13:45:252:53:108:3912:51
9:27
#18777
21M
21.00 mi13:55:363:03:218:4410:11
10:11
#18793
35K
21.75 mi14:02:503:10:358:467:14
9:40
#18897
23M
23.00 mi14:15:293:23:148:5012:39
10:06
#19082
24M
24.00 mi14:25:243:33:098:539:55
9:55
#19199
40K
24.85 mi14:34:483:42:338:579:24
11:00
#19439
25.2M
25.20 mi14:38:483:46:338:594:00
11:36
#19504
Finish
26.22 mi14:48:253:56:109:019:37
9:26
#19584
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM55-59Seg. OverallSeg. MalesSeg. M55-59
5K3.11 mi3.11 mi18735119221192218986(Top 67%)12042(Top 75%)12042(Top 731%)
10K6.21 mi3.10 mi18958-22312021-9912021-9919226(Top 68%)12158(Top 75%)12158(Top 738%)
15K9.32 mi3.11 mi18934+2412005+1612005+1618986(Top 67%)12042(Top 75%)12042(Top 731%)
20K12.43 mi3.11 mi18847+8711975+3011975+3018718(Top 66%)11916(Top 74%)11916(Top 723%)
Half13.11 mi0.68 mi18862-1511979-411979-419018(Top 67%)12058(Top 75%)12058(Top 732%)
25K15.53 mi2.42 mi18823+3911959+2011959+2018665(Top 66%)11821(Top 73%)11821(Top 717%)
30K18.64 mi3.11 mi18751+7211897+6211897+6218538(Top 65%)11640(Top 72%)11640(Top 706%)
20M20.00 mi1.36 mi18777-2611879+1811879+1818966(Top 67%)11676(Top 72%)11676(Top 708%)
21M21.00 mi1.00 mi18793-1611856+2311856+2318966(Top 67%)11600(Top 72%)11600(Top 704%)
35K21.75 mi0.75 mi18897-10411877-2111877-2120885(Top 74%)12390(Top 77%)12390(Top 752%)
23M23.00 mi1.25 mi19082-18511935-5811935-5820811(Top 73%)12300(Top 76%)12300(Top 746%)
24M24.00 mi1.00 mi19199-11711963-2811963-2821102(Top 74%)12392(Top 77%)12392(Top 752%)
40K24.85 mi0.85 mi19439-24012040-7712040-7723120(Top 81%)13292(Top 83%)13292(Top 807%)
25.2M25.20 mi0.35 mi19504-6512059-1912059-1922267(Top 78%)12917(Top 80%)12917(Top 784%)
Finish26.22 mi1.02 mi19584-8012069-1012069-1020948(Top 74%)12261(Top 76%)12261(Top 744%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 67%
×21story building
+97ft-345ft

Overall

18986

Males

12042

M55-59

12042

5K→10K

3.1 - 6.2 mi

Top 68%
×5story building
+79ft-138ft

Overall

19226

Males

12158

M55-59

12158

10K→15K

6.2 - 9.3 mi

Top 67%
×3story building
+67ft-78ft

Overall

18986

Males

12042

M55-59

12042

15K→20K

9.3 - 12.4 mi

Top 66%
×5story building
+106ft-86ft

Overall

18718

Males

11916

M55-59

11916

20K→Half

12.4 - 13.1 mi

Top 67%
×2story building
+19ft-37ft

Overall

19018

Males

12058

M55-59

12058

Half→25K

13.1 - 15.5 mi

Top 66%
×4story building
+66ft-88ft

Overall

18665

Males

11821

M55-59

11821

25K→30K

15.5 - 18.6 mi

Top 65%
×9story building
+181ft-148ft

Overall

18538

Males

11640

M55-59

11640

30K→20M

18.6 - 20.0 mi

Top 67%
×5story building
+64ft-50ft

Overall

18966

Males

11676

M55-59

11676

20M→21M

20.0 - 21.0 mi

Top 67%
×8story building
+106ft-24ft

Overall

18966

Males

11600

M55-59

11600

21M→35K

21.0 - 21.8 mi

Top 74%
×7story building
+17ft-86ft

Overall

20885

Males

12390

M55-59

12390

35K→23M

21.8 - 23.0 mi

Top 73%
×5story building
+23ft-63ft

Overall

20811

Males

12300

M55-59

12300

23M→24M

23.0 - 24.0 mi

Top 74%
×6story building
+12ft-82ft

Overall

21102

Males

12392

M55-59

12392

24M→40K

24.0 - 24.9 mi

Top 81%
×1story
+6ft-20ft

Overall

23120

Males

13292

M55-59

13292

40K→25.2M

24.9 - 25.2 mi

Top 78%
×1story
+13ft-16ft

Overall

22267

Males

12917

M55-59

12917

25.2M→Finish

25.2 - 26.2 mi

Top 74%
×2story building
+22ft-21ft

Overall

20948

Males

12261

M55-59

12261

Passing Analysis

Category:
Athletes Passed
1481
Passed By
2330
Net Change
-849
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#18735
5K → 10K176399-223#18735#18958
10K → 15K205181+24#18958#18934
15K → 20K235148+87#18934#18847
20K → Half2944-15#18847#18862
Half → 25K185146+39#18862#18823
25K → 30K275203+72#18823#18751
30K → 20M92118-26#18751#18777
20M → 21M104120-16#18777#18793
21M → 35K31135-104#18793#18897
35K → 23M44229-185#18897#19082
23M → 24M34151-117#19082#19199
24M → 40K23263-240#19199#19439
40K → 25.2M1176-65#19439#19504
25.2M → Finish37117-80#19504#19584
TOTALS14812330-849
📊

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