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SF MARATHON 1ST HALF 2025

Jonathan Guffain

Alameda, CA

Bib: 14826 M 47

0:00
0:00
/ mi
Masters
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Overall
#0 / 7100
Gender (Male)
#0 / 3977
Masters (Masters Men)
#0 / 1096
Division (M45-49)
#0 / 282
Race Day Weather
56°/46°F
light rain

Race Timeline

Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
10 ft elev
1.81M
9:43/mi
17:36
→ flat
12 ft elev
5.34M
10:33/mi
54:49
↑ 80↓ 74
19 ft elev
6.15M
10:35/mi
1:03:23
↑ 1262.8%
149 ft elev
10.54M
11:27/mi
1:53:39
↑ 230↓ 3610.6%
20 ft elev
11.05M
20:49/mi
2:04:16
↑ 1726.4%
213 ft elev
Finish· 13.11 mi
11:42/mi
2:28:21
↑ 97↓ 1140.2%
205 ft elev
Course Elevation
10–277 ft
≈
×22story building
•▲ 774 ft climb · ▼ 557 ft descent

The Course

Half Splits

1st Half· via 6.15M
1:03:2310:18 /mi⚡ faster
2nd Half
1:24:5812:13 /mi+34.1%
Positive split — 34.1% slower in the second half
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Your race, unpacked

See your splits, ranks & AI insights.

Checkpoint Splits

CheckpointTimeAvg PaceSegment LengthSegment TimeSegment PaceTrendDiff
1.81M
17:369:431.81 mi17:36
9:43
-
5.34M
54:4910:163.53 mi37:13
10:33
+0:50
6.15M
1:03:2310:180.81 mi8:34
10:35
+0:02
10.54M
1:53:3910:474.39 mi50:16
11:27
+0:52
11.05M
2:04:1611:150.51 mi10:37
20:49
+9:22
Finish(13.11 mi)
2:28:2111:192.06 mi24:05
11:42
-9:07
Trend:
Faster pace
Steady pace
Slower pace

Checkpoints & Pacing

Pace Line

Fastest Pace

9:43 /mi

Average Pace

11:19 /mi

Slowest Pace

20:49 /mi

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Fastest
Middle
Slowest
Average

Segments

Time at Faster Pace

0:00

0% of race

Time at Steady Pace

2:17:44

93% of race

Time at Slower Pace

10:37

7% of race

Average Pace: 11:19 /mi

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Faster pace (< avg)
Steady pace (≈ avg)
Slower pace (> avg)

Heatmap

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0mi3.3mi6.6mi9.8mi13.1mi
Pace:
Faster
Steady
Slower

Checkpoint and Segment Rankings

CheckpointSeg. DistOverallMalesM45-49Seg. OverallSeg. MalesSeg. M45-49
1.81M1.81 mi3362228514333622285143
5.34M3.53 mi3992-6302608-323156-1343282773167
6.15M0.81 mi3890+1022555+53150+635412367131
10.54M4.39 mi4326-4362767-212168-1848172970187
11.05M0.51 mi4680-3542937-170183-1567953838268
Finish(13.11 mi)2.06 mi4622+582876+61179+446552818177

Segment Performance Analysis

Start → 1.81M

0.0 - 1.8 mi

Top 47%
~flat
+4ft-3ft

Overall

3362

Males

2285

M45-49

144

1.81M→5.34M

1.8 - 5.3 mi

Top 61%
×4story building
+80ft-74ft

Overall

4328

Males

2773

M45-49

168

5.34M→6.15M

5.3 - 6.2 mi

Top 50%
×10story building
+126ft-4ft

Overall

3541

Males

2367

M45-49

132

6.15M→10.54M

6.2 - 10.5 mi

Top 68%
×21story building
+230ft-361ft

Overall

4817

Males

2970

M45-49

187

10.54M→11.05M

10.5 - 11.1 mi

Top 96%
×14story building
+172ft-0ft

Overall

6795

Males

3838

M45-49

268

11.05M→Finish

11.1 - 13.1 mi

Top 66%
×7story building
+97ft-114ft

Overall

4655

Males

2818

M45-49

177

Passing Analysis

Category:
Passed
371*
Passed By
1631
Net Change
-1260
SegmentPassedPassed ByNet ChangeStart RankEnd Rank
Start → 1.81M----#3362
1.81M → 5.34M73*703-630#3362#3992
5.34M → 6.15M12119+102#3992#3890
6.15M → 10.54M60*496-436#3890#4326
10.54M → 11.05M0354-354#4326#4680
11.05M → Finish117*59+58#4680#4622
TOTALS371*1631-1260

* Includes athletes who did not complete a segment (DNF/DNQ).

Passing Charts

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Passing Circle

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Position Flow

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Race Lanes

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Official Timing Data

The San Francisco Marathon

The San Francisco Marathon

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